diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfig.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfig.java
index fac6f574fe..b0b0aaca1e 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfig.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfig.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 /**
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigDelta.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigDelta.java
index 440dab63d8..69e1164bd4 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigDelta.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigDelta.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 /**
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigDeltaOrBuilder.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigDeltaOrBuilder.java
index e1bea6c244..f9aeb38635 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigDeltaOrBuilder.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigDeltaOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public interface AuditConfigDeltaOrBuilder
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigOrBuilder.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigOrBuilder.java
index 06911aaf2b..9a6b3b15b5 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigOrBuilder.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public interface AuditConfigOrBuilder
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditLogConfig.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditLogConfig.java
index 1e5f85f7a9..236a141e97 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditLogConfig.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditLogConfig.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 /**
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditLogConfigOrBuilder.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditLogConfigOrBuilder.java
index 4025472975..c313f23210 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditLogConfigOrBuilder.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditLogConfigOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public interface AuditLogConfigOrBuilder
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Binding.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Binding.java
index 778f23ff58..17e69c5ff0 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Binding.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Binding.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 /**
@@ -60,6 +61,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
             com.google.iam.v1.Binding.class, com.google.iam.v1.Binding.Builder.class);
   }
 
+  private int bitField0_;
   public static final int ROLE_FIELD_NUMBER = 1;
 
   @SuppressWarnings("serial")
@@ -367,7 +369,7 @@ public com.google.protobuf.ByteString getMembersBytes(int index) {
    */
   @java.lang.Override
   public boolean hasCondition() {
-    return condition_ != null;
+    return ((bitField0_ & 0x00000001) != 0);
   }
   /**
    *
@@ -440,7 +442,7 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     for (int i = 0; i < members_.size(); i++) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 2, members_.getRaw(i));
     }
-    if (condition_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(3, getCondition());
     }
     getUnknownFields().writeTo(output);
@@ -463,7 +465,7 @@ public int getSerializedSize() {
       size += dataSize;
       size += 1 * getMembersList().size();
     }
-    if (condition_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getCondition());
     }
     size += getUnknownFields().getSerializedSize();
@@ -633,10 +635,19 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     }
 
     // Construct using com.google.iam.v1.Binding.newBuilder()
-    private Builder() {}
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
 
     private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
       super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getConditionFieldBuilder();
+      }
     }
 
     @java.lang.Override
@@ -691,9 +702,12 @@ private void buildPartial0(com.google.iam.v1.Binding result) {
         members_.makeImmutable();
         result.members_ = members_;
       }
+      int to_bitField0_ = 0;
       if (((from_bitField0_ & 0x00000004) != 0)) {
         result.condition_ = conditionBuilder_ == null ? condition_ : conditionBuilder_.build();
+        to_bitField0_ |= 0x00000001;
       }
+      result.bitField0_ |= to_bitField0_;
     }
 
     @java.lang.Override
@@ -1630,8 +1644,10 @@ public Builder mergeCondition(com.google.type.Expr value) {
       } else {
         conditionBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000004;
-      onChanged();
+      if (condition_ != null) {
+        bitField0_ |= 0x00000004;
+        onChanged();
+      }
       return this;
     }
     /**
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingDelta.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingDelta.java
index 3474c4b814..1c93c13bfb 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingDelta.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingDelta.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 /**
@@ -220,6 +221,7 @@ private Action(int value) {
     // @@protoc_insertion_point(enum_scope:google.iam.v1.BindingDelta.Action)
   }
 
+  private int bitField0_;
   public static final int ACTION_FIELD_NUMBER = 1;
   private int action_ = 0;
   /**
@@ -382,7 +384,7 @@ public com.google.protobuf.ByteString getMemberBytes() {
    */
   @java.lang.Override
   public boolean hasCondition() {
-    return condition_ != null;
+    return ((bitField0_ & 0x00000001) != 0);
   }
   /**
    *
@@ -436,7 +438,7 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(member_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 3, member_);
     }
-    if (condition_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(4, getCondition());
     }
     getUnknownFields().writeTo(output);
@@ -457,7 +459,7 @@ public int getSerializedSize() {
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(member_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(3, member_);
     }
-    if (condition_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(4, getCondition());
     }
     size += getUnknownFields().getSerializedSize();
@@ -630,10 +632,19 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     }
 
     // Construct using com.google.iam.v1.BindingDelta.newBuilder()
-    private Builder() {}
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
 
     private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
       super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getConditionFieldBuilder();
+      }
     }
 
     @java.lang.Override
@@ -691,9 +702,12 @@ private void buildPartial0(com.google.iam.v1.BindingDelta result) {
       if (((from_bitField0_ & 0x00000004) != 0)) {
         result.member_ = member_;
       }
+      int to_bitField0_ = 0;
       if (((from_bitField0_ & 0x00000008) != 0)) {
         result.condition_ = conditionBuilder_ == null ? condition_ : conditionBuilder_.build();
+        to_bitField0_ |= 0x00000001;
       }
+      result.bitField0_ |= to_bitField0_;
     }
 
     @java.lang.Override
@@ -1251,8 +1265,10 @@ public Builder mergeCondition(com.google.type.Expr value) {
       } else {
         conditionBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000008;
-      onChanged();
+      if (condition_ != null) {
+        bitField0_ |= 0x00000008;
+        onChanged();
+      }
       return this;
     }
     /**
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingDeltaOrBuilder.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingDeltaOrBuilder.java
index 19c3c51200..b76744913f 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingDeltaOrBuilder.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingDeltaOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public interface BindingDeltaOrBuilder
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingOrBuilder.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingOrBuilder.java
index 3210a84fa6..c6f2fafbef 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingOrBuilder.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public interface BindingOrBuilder
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetIamPolicyRequest.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetIamPolicyRequest.java
index 0de2f70543..1c94f5957b 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetIamPolicyRequest.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetIamPolicyRequest.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/iam_policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 /**
@@ -62,6 +63,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
             com.google.iam.v1.GetIamPolicyRequest.Builder.class);
   }
 
+  private int bitField0_;
   public static final int RESOURCE_FIELD_NUMBER = 1;
 
   @SuppressWarnings("serial")
@@ -135,7 +137,7 @@ public com.google.protobuf.ByteString getResourceBytes() {
    */
   @java.lang.Override
   public boolean hasOptions() {
-    return options_ != null;
+    return ((bitField0_ & 0x00000001) != 0);
   }
   /**
    *
@@ -185,7 +187,7 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(resource_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, resource_);
     }
-    if (options_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(2, getOptions());
     }
     getUnknownFields().writeTo(output);
@@ -200,7 +202,7 @@ public int getSerializedSize() {
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(resource_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, resource_);
     }
-    if (options_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getOptions());
     }
     size += getUnknownFields().getSerializedSize();
@@ -368,10 +370,19 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     }
 
     // Construct using com.google.iam.v1.GetIamPolicyRequest.newBuilder()
-    private Builder() {}
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
 
     private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
       super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getOptionsFieldBuilder();
+      }
     }
 
     @java.lang.Override
@@ -423,9 +434,12 @@ private void buildPartial0(com.google.iam.v1.GetIamPolicyRequest result) {
       if (((from_bitField0_ & 0x00000001) != 0)) {
         result.resource_ = resource_;
       }
+      int to_bitField0_ = 0;
       if (((from_bitField0_ & 0x00000002) != 0)) {
         result.options_ = optionsBuilder_ == null ? options_ : optionsBuilder_.build();
+        to_bitField0_ |= 0x00000001;
       }
+      result.bitField0_ |= to_bitField0_;
     }
 
     @java.lang.Override
@@ -766,8 +780,10 @@ public Builder mergeOptions(com.google.iam.v1.GetPolicyOptions value) {
       } else {
         optionsBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000002;
-      onChanged();
+      if (options_ != null) {
+        bitField0_ |= 0x00000002;
+        onChanged();
+      }
       return this;
     }
     /**
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetIamPolicyRequestOrBuilder.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetIamPolicyRequestOrBuilder.java
index 5f90592d42..efa95ef76d 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetIamPolicyRequestOrBuilder.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetIamPolicyRequestOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/iam_policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public interface GetIamPolicyRequestOrBuilder
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetPolicyOptions.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetPolicyOptions.java
index e35ffbc58c..8e8e71c9b5 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetPolicyOptions.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetPolicyOptions.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/options.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 /**
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetPolicyOptionsOrBuilder.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetPolicyOptionsOrBuilder.java
index e93425ad57..b7dcd6b3cd 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetPolicyOptionsOrBuilder.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetPolicyOptionsOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/options.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public interface GetPolicyOptionsOrBuilder
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/IamPolicyProto.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/IamPolicyProto.java
index a61d0e275d..29b08f3bb0 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/IamPolicyProto.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/IamPolicyProto.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/iam_policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public final class IamPolicyProto {
@@ -58,31 +59,31 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "_behavior.proto\032\031google/api/resource.pro"
           + "to\032\033google/iam/v1/options.proto\032\032google/"
           + "iam/v1/policy.proto\032 google/protobuf/fie"
-          + "ld_mask.proto\"\221\001\n\023SetIamPolicyRequest\022\034\n"
-          + "\010resource\030\001 \001(\tB\n\342A\001\002\372A\003\n\001*\022+\n\006policy\030\002 "
-          + "\001(\0132\025.google.iam.v1.PolicyB\004\342A\001\002\022/\n\013upda"
-          + "te_mask\030\003 \001(\0132\032.google.protobuf.FieldMas"
-          + "k\"e\n\023GetIamPolicyRequest\022\034\n\010resource\030\001 \001"
-          + "(\tB\n\342A\001\002\372A\003\n\001*\0220\n\007options\030\002 \001(\0132\037.google"
-          + ".iam.v1.GetPolicyOptions\"T\n\031TestIamPermi"
-          + "ssionsRequest\022\034\n\010resource\030\001 \001(\tB\n\342A\001\002\372A\003"
-          + "\n\001*\022\031\n\013permissions\030\002 \003(\tB\004\342A\001\002\"1\n\032TestIa"
-          + "mPermissionsResponse\022\023\n\013permissions\030\001 \003("
-          + "\t2\264\003\n\tIAMPolicy\022t\n\014SetIamPolicy\022\".google"
-          + ".iam.v1.SetIamPolicyRequest\032\025.google.iam"
-          + ".v1.Policy\")\202\323\344\223\002#\"\036/v1/{resource=**}:se"
-          + "tIamPolicy:\001*\022t\n\014GetIamPolicy\022\".google.i"
-          + "am.v1.GetIamPolicyRequest\032\025.google.iam.v"
-          + "1.Policy\")\202\323\344\223\002#\"\036/v1/{resource=**}:getI"
-          + "amPolicy:\001*\022\232\001\n\022TestIamPermissions\022(.goo"
-          + "gle.iam.v1.TestIamPermissionsRequest\032).g"
-          + "oogle.iam.v1.TestIamPermissionsResponse\""
-          + "/\202\323\344\223\002)\"$/v1/{resource=**}:testIamPermis"
-          + "sions:\001*\032\036\312A\033iam-meta-api.googleapis.com"
-          + "B\177\n\021com.google.iam.v1B\016IamPolicyProtoP\001Z"
-          + ")cloud.google.com/go/iam/apiv1/iampb;iam"
-          + "pb\370\001\001\252\002\023Google.Cloud.Iam.V1\312\002\023Google\\Clo"
-          + "ud\\Iam\\V1b\006proto3"
+          + "ld_mask.proto\"\217\001\n\023SetIamPolicyRequest\022\033\n"
+          + "\010resource\030\001 \001(\tB\t\340A\002\372A\003\n\001*\022*\n\006policy\030\002 \001"
+          + "(\0132\025.google.iam.v1.PolicyB\003\340A\002\022/\n\013update"
+          + "_mask\030\003 \001(\0132\032.google.protobuf.FieldMask\""
+          + "d\n\023GetIamPolicyRequest\022\033\n\010resource\030\001 \001(\t"
+          + "B\t\340A\002\372A\003\n\001*\0220\n\007options\030\002 \001(\0132\037.google.ia"
+          + "m.v1.GetPolicyOptions\"R\n\031TestIamPermissi"
+          + "onsRequest\022\033\n\010resource\030\001 \001(\tB\t\340A\002\372A\003\n\001*\022"
+          + "\030\n\013permissions\030\002 \003(\tB\003\340A\002\"1\n\032TestIamPerm"
+          + "issionsResponse\022\023\n\013permissions\030\001 \003(\t2\264\003\n"
+          + "\tIAMPolicy\022t\n\014SetIamPolicy\022\".google.iam."
+          + "v1.SetIamPolicyRequest\032\025.google.iam.v1.P"
+          + "olicy\")\202\323\344\223\002#\"\036/v1/{resource=**}:setIamP"
+          + "olicy:\001*\022t\n\014GetIamPolicy\022\".google.iam.v1"
+          + ".GetIamPolicyRequest\032\025.google.iam.v1.Pol"
+          + "icy\")\202\323\344\223\002#\"\036/v1/{resource=**}:getIamPol"
+          + "icy:\001*\022\232\001\n\022TestIamPermissions\022(.google.i"
+          + "am.v1.TestIamPermissionsRequest\032).google"
+          + ".iam.v1.TestIamPermissionsResponse\"/\202\323\344\223"
+          + "\002)\"$/v1/{resource=**}:testIamPermissions"
+          + ":\001*\032\036\312A\033iam-meta-api.googleapis.comB\177\n\021c"
+          + "om.google.iam.v1B\016IamPolicyProtoP\001Z)clou"
+          + "d.google.com/go/iam/apiv1/iampb;iampb\370\001\001"
+          + "\252\002\023Google.Cloud.Iam.V1\312\002\023Google\\Cloud\\Ia"
+          + "m\\V1b\006proto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/OptionsProto.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/OptionsProto.java
index 9f6acfc563..7d66e302b2 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/OptionsProto.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/OptionsProto.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/options.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public final class OptionsProto {
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Policy.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Policy.java
index f083596f44..e6525d22c3 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Policy.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Policy.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 /**
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyDelta.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyDelta.java
index 0bb05d202a..67b9e25988 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyDelta.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyDelta.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 /**
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyDeltaOrBuilder.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyDeltaOrBuilder.java
index fd3e1c0ddc..2682ceaa9b 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyDeltaOrBuilder.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyDeltaOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public interface PolicyDeltaOrBuilder
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyOrBuilder.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyOrBuilder.java
index 2039d3792a..ab84de9cd6 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyOrBuilder.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public interface PolicyOrBuilder
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyProto.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyProto.java
index 13ad10267e..1b5726937d 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyProto.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyProto.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public final class PolicyProto {
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/SetIamPolicyRequest.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/SetIamPolicyRequest.java
index 791d082320..d5d97a66e1 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/SetIamPolicyRequest.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/SetIamPolicyRequest.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/iam_policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 /**
@@ -62,6 +63,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
             com.google.iam.v1.SetIamPolicyRequest.Builder.class);
   }
 
+  private int bitField0_;
   public static final int RESOURCE_FIELD_NUMBER = 1;
 
   @SuppressWarnings("serial")
@@ -137,7 +139,7 @@ public com.google.protobuf.ByteString getResourceBytes() {
    */
   @java.lang.Override
   public boolean hasPolicy() {
-    return policy_ != null;
+    return ((bitField0_ & 0x00000001) != 0);
   }
   /**
    *
@@ -193,7 +195,7 @@ public com.google.iam.v1.PolicyOrBuilder getPolicyOrBuilder() {
    */
   @java.lang.Override
   public boolean hasUpdateMask() {
-    return updateMask_ != null;
+    return ((bitField0_ & 0x00000002) != 0);
   }
   /**
    *
@@ -249,10 +251,10 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(resource_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, resource_);
     }
-    if (policy_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(2, getPolicy());
     }
-    if (updateMask_ != null) {
+    if (((bitField0_ & 0x00000002) != 0)) {
       output.writeMessage(3, getUpdateMask());
     }
     getUnknownFields().writeTo(output);
@@ -267,10 +269,10 @@ public int getSerializedSize() {
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(resource_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, resource_);
     }
-    if (policy_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getPolicy());
     }
-    if (updateMask_ != null) {
+    if (((bitField0_ & 0x00000002) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getUpdateMask());
     }
     size += getUnknownFields().getSerializedSize();
@@ -446,10 +448,20 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     }
 
     // Construct using com.google.iam.v1.SetIamPolicyRequest.newBuilder()
-    private Builder() {}
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
 
     private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
       super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getPolicyFieldBuilder();
+        getUpdateMaskFieldBuilder();
+      }
     }
 
     @java.lang.Override
@@ -506,12 +518,16 @@ private void buildPartial0(com.google.iam.v1.SetIamPolicyRequest result) {
       if (((from_bitField0_ & 0x00000001) != 0)) {
         result.resource_ = resource_;
       }
+      int to_bitField0_ = 0;
       if (((from_bitField0_ & 0x00000002) != 0)) {
         result.policy_ = policyBuilder_ == null ? policy_ : policyBuilder_.build();
+        to_bitField0_ |= 0x00000001;
       }
       if (((from_bitField0_ & 0x00000004) != 0)) {
         result.updateMask_ = updateMaskBuilder_ == null ? updateMask_ : updateMaskBuilder_.build();
+        to_bitField0_ |= 0x00000002;
       }
+      result.bitField0_ |= to_bitField0_;
     }
 
     @java.lang.Override
@@ -869,8 +885,10 @@ public Builder mergePolicy(com.google.iam.v1.Policy value) {
       } else {
         policyBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000002;
-      onChanged();
+      if (policy_ != null) {
+        bitField0_ |= 0x00000002;
+        onChanged();
+      }
       return this;
     }
     /**
@@ -1081,8 +1099,10 @@ public Builder mergeUpdateMask(com.google.protobuf.FieldMask value) {
       } else {
         updateMaskBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000004;
-      onChanged();
+      if (updateMask_ != null) {
+        bitField0_ |= 0x00000004;
+        onChanged();
+      }
       return this;
     }
     /**
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/SetIamPolicyRequestOrBuilder.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/SetIamPolicyRequestOrBuilder.java
index b7c42c8855..2d3c2734e0 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/SetIamPolicyRequestOrBuilder.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/SetIamPolicyRequestOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/iam_policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public interface SetIamPolicyRequestOrBuilder
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsRequest.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsRequest.java
index 6f976b91d9..692d4dd982 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsRequest.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsRequest.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/iam_policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 /**
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsRequestOrBuilder.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsRequestOrBuilder.java
index 53b56f2781..3a5236284c 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsRequestOrBuilder.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsRequestOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/iam_policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public interface TestIamPermissionsRequestOrBuilder
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsResponse.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsResponse.java
index 5aa85996b5..93d6e4c9c5 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsResponse.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsResponse.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/iam_policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 /**
diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsResponseOrBuilder.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsResponseOrBuilder.java
index da677cbe54..27a9066426 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsResponseOrBuilder.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsResponseOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v1/iam_policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v1;
 
 public interface TestIamPermissionsResponseOrBuilder
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/CreatePolicyRequest.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/CreatePolicyRequest.java
index aebfd03e94..30828b2591 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/CreatePolicyRequest.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/CreatePolicyRequest.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 /**
@@ -63,6 +64,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
             com.google.iam.v2.CreatePolicyRequest.Builder.class);
   }
 
+  private int bitField0_;
   public static final int PARENT_FIELD_NUMBER = 1;
 
   @SuppressWarnings("serial")
@@ -149,7 +151,7 @@ public com.google.protobuf.ByteString getParentBytes() {
    */
   @java.lang.Override
   public boolean hasPolicy() {
-    return policy_ != null;
+    return ((bitField0_ & 0x00000001) != 0);
   }
   /**
    *
@@ -254,7 +256,7 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(parent_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, parent_);
     }
-    if (policy_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(2, getPolicy());
     }
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(policyId_)) {
@@ -272,7 +274,7 @@ public int getSerializedSize() {
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(parent_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, parent_);
     }
-    if (policy_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getPolicy());
     }
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(policyId_)) {
@@ -446,10 +448,19 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     }
 
     // Construct using com.google.iam.v2.CreatePolicyRequest.newBuilder()
-    private Builder() {}
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
 
     private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
       super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getPolicyFieldBuilder();
+      }
     }
 
     @java.lang.Override
@@ -502,12 +513,15 @@ private void buildPartial0(com.google.iam.v2.CreatePolicyRequest result) {
       if (((from_bitField0_ & 0x00000001) != 0)) {
         result.parent_ = parent_;
       }
+      int to_bitField0_ = 0;
       if (((from_bitField0_ & 0x00000002) != 0)) {
         result.policy_ = policyBuilder_ == null ? policy_ : policyBuilder_.build();
+        to_bitField0_ |= 0x00000001;
       }
       if (((from_bitField0_ & 0x00000004) != 0)) {
         result.policyId_ = policyId_;
       }
+      result.bitField0_ |= to_bitField0_;
     }
 
     @java.lang.Override
@@ -887,8 +901,10 @@ public Builder mergePolicy(com.google.iam.v2.Policy value) {
       } else {
         policyBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000002;
-      onChanged();
+      if (policy_ != null) {
+        bitField0_ |= 0x00000002;
+        onChanged();
+      }
       return this;
     }
     /**
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/CreatePolicyRequestOrBuilder.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/CreatePolicyRequestOrBuilder.java
index 750931920c..d0f692435f 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/CreatePolicyRequestOrBuilder.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/CreatePolicyRequestOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 public interface CreatePolicyRequestOrBuilder
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DeletePolicyRequest.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DeletePolicyRequest.java
index da614d7f5d..93d838121e 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DeletePolicyRequest.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DeletePolicyRequest.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 /**
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DeletePolicyRequestOrBuilder.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DeletePolicyRequestOrBuilder.java
index 16a7afe664..c69dd95e58 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DeletePolicyRequestOrBuilder.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DeletePolicyRequestOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 public interface DeletePolicyRequestOrBuilder
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DenyRule.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DenyRule.java
index b2c67c6e00..e24a4c0f15 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DenyRule.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DenyRule.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/deny.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 /**
@@ -62,6 +63,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
             com.google.iam.v2.DenyRule.class, com.google.iam.v2.DenyRule.Builder.class);
   }
 
+  private int bitField0_;
   public static final int DENIED_PRINCIPALS_FIELD_NUMBER = 1;
 
   @SuppressWarnings("serial")
@@ -563,7 +565,7 @@ public com.google.protobuf.ByteString getExceptionPermissionsBytes(int index) {
    */
   @java.lang.Override
   public boolean hasDenialCondition() {
-    return denialCondition_ != null;
+    return ((bitField0_ & 0x00000001) != 0);
   }
   /**
    *
@@ -641,7 +643,7 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
       com.google.protobuf.GeneratedMessageV3.writeString(
           output, 4, exceptionPermissions_.getRaw(i));
     }
-    if (denialCondition_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(5, getDenialCondition());
     }
     getUnknownFields().writeTo(output);
@@ -685,7 +687,7 @@ public int getSerializedSize() {
       size += dataSize;
       size += 1 * getExceptionPermissionsList().size();
     }
-    if (denialCondition_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(5, getDenialCondition());
     }
     size += getUnknownFields().getSerializedSize();
@@ -868,10 +870,19 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     }
 
     // Construct using com.google.iam.v2.DenyRule.newBuilder()
-    private Builder() {}
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
 
     private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
       super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getDenialConditionFieldBuilder();
+      }
     }
 
     @java.lang.Override
@@ -937,10 +948,13 @@ private void buildPartial0(com.google.iam.v2.DenyRule result) {
         exceptionPermissions_.makeImmutable();
         result.exceptionPermissions_ = exceptionPermissions_;
       }
+      int to_bitField0_ = 0;
       if (((from_bitField0_ & 0x00000010) != 0)) {
         result.denialCondition_ =
             denialConditionBuilder_ == null ? denialCondition_ : denialConditionBuilder_.build();
+        to_bitField0_ |= 0x00000001;
       }
+      result.bitField0_ |= to_bitField0_;
     }
 
     @java.lang.Override
@@ -2451,8 +2465,10 @@ public Builder mergeDenialCondition(com.google.type.Expr value) {
       } else {
         denialConditionBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000010;
-      onChanged();
+      if (denialCondition_ != null) {
+        bitField0_ |= 0x00000010;
+        onChanged();
+      }
       return this;
     }
     /**
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DenyRuleOrBuilder.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DenyRuleOrBuilder.java
index cb8dd9758c..e2551f3e75 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DenyRuleOrBuilder.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DenyRuleOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/deny.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 public interface DenyRuleOrBuilder
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DenyRuleProto.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DenyRuleProto.java
index fbe8dc3714..4b9b73d966 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DenyRuleProto.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/DenyRuleProto.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/deny.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 public final class DenyRuleProto {
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/GetPolicyRequest.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/GetPolicyRequest.java
index 77cc07fc1b..eab2ddc328 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/GetPolicyRequest.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/GetPolicyRequest.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 /**
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/GetPolicyRequestOrBuilder.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/GetPolicyRequestOrBuilder.java
index 4756f85ed0..739fa7f84e 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/GetPolicyRequestOrBuilder.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/GetPolicyRequestOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 public interface GetPolicyRequestOrBuilder
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesRequest.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesRequest.java
index c73842ac23..5c9d450d59 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesRequest.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesRequest.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 /**
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesRequestOrBuilder.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesRequestOrBuilder.java
index 45bde87af8..5b466283af 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesRequestOrBuilder.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesRequestOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 public interface ListPoliciesRequestOrBuilder
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesResponse.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesResponse.java
index 12b0194f2a..f8b752043d 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesResponse.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesResponse.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 /**
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesResponseOrBuilder.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesResponseOrBuilder.java
index 1faeb31cfb..b737d57d25 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesResponseOrBuilder.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/ListPoliciesResponseOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 public interface ListPoliciesResponseOrBuilder
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/Policy.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/Policy.java
index 050d80fdb2..d5a747ef61 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/Policy.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/Policy.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 /**
@@ -59,7 +60,8 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
 
   @SuppressWarnings({"rawtypes"})
   @java.lang.Override
-  protected com.google.protobuf.MapField internalGetMapField(int number) {
+  protected com.google.protobuf.MapFieldReflectionAccessor internalGetMapFieldReflection(
+      int number) {
     switch (number) {
       case 5:
         return internalGetAnnotations();
@@ -76,6 +78,7 @@ protected com.google.protobuf.MapField internalGetMapField(int number) {
             com.google.iam.v2.Policy.class, com.google.iam.v2.Policy.Builder.class);
   }
 
+  private int bitField0_;
   public static final int NAME_FIELD_NUMBER = 1;
 
   @SuppressWarnings("serial")
@@ -490,7 +493,7 @@ public com.google.protobuf.ByteString getEtagBytes() {
    */
   @java.lang.Override
   public boolean hasCreateTime() {
-    return createTime_ != null;
+    return ((bitField0_ & 0x00000001) != 0);
   }
   /**
    *
@@ -539,7 +542,7 @@ public com.google.protobuf.TimestampOrBuilder getCreateTimeOrBuilder() {
    */
   @java.lang.Override
   public boolean hasUpdateTime() {
-    return updateTime_ != null;
+    return ((bitField0_ & 0x00000002) != 0);
   }
   /**
    *
@@ -588,7 +591,7 @@ public com.google.protobuf.TimestampOrBuilder getUpdateTimeOrBuilder() {
    */
   @java.lang.Override
   public boolean hasDeleteTime() {
-    return deleteTime_ != null;
+    return ((bitField0_ & 0x00000004) != 0);
   }
   /**
    *
@@ -780,13 +783,13 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(etag_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 6, etag_);
     }
-    if (createTime_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(7, getCreateTime());
     }
-    if (updateTime_ != null) {
+    if (((bitField0_ & 0x00000002) != 0)) {
       output.writeMessage(8, getUpdateTime());
     }
-    if (deleteTime_ != null) {
+    if (((bitField0_ & 0x00000004) != 0)) {
       output.writeMessage(9, getDeleteTime());
     }
     for (int i = 0; i < rules_.size(); i++) {
@@ -829,13 +832,13 @@ public int getSerializedSize() {
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(etag_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(6, etag_);
     }
-    if (createTime_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(7, getCreateTime());
     }
-    if (updateTime_ != null) {
+    if (((bitField0_ & 0x00000002) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(8, getUpdateTime());
     }
-    if (deleteTime_ != null) {
+    if (((bitField0_ & 0x00000004) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(9, getDeleteTime());
     }
     for (int i = 0; i < rules_.size(); i++) {
@@ -1039,7 +1042,8 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     }
 
     @SuppressWarnings({"rawtypes"})
-    protected com.google.protobuf.MapField internalGetMapField(int number) {
+    protected com.google.protobuf.MapFieldReflectionAccessor internalGetMapFieldReflection(
+        int number) {
       switch (number) {
         case 5:
           return internalGetAnnotations();
@@ -1049,7 +1053,8 @@ protected com.google.protobuf.MapField internalGetMapField(int number) {
     }
 
     @SuppressWarnings({"rawtypes"})
-    protected com.google.protobuf.MapField internalGetMutableMapField(int number) {
+    protected com.google.protobuf.MapFieldReflectionAccessor internalGetMutableMapFieldReflection(
+        int number) {
       switch (number) {
         case 5:
           return internalGetMutableAnnotations();
@@ -1067,10 +1072,22 @@ protected com.google.protobuf.MapField internalGetMutableMapField(int number) {
     }
 
     // Construct using com.google.iam.v2.Policy.newBuilder()
-    private Builder() {}
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
 
     private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
       super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getCreateTimeFieldBuilder();
+        getUpdateTimeFieldBuilder();
+        getDeleteTimeFieldBuilder();
+        getRulesFieldBuilder();
+      }
     }
 
     @java.lang.Override
@@ -1172,18 +1189,23 @@ private void buildPartial0(com.google.iam.v2.Policy result) {
       if (((from_bitField0_ & 0x00000020) != 0)) {
         result.etag_ = etag_;
       }
+      int to_bitField0_ = 0;
       if (((from_bitField0_ & 0x00000040) != 0)) {
         result.createTime_ = createTimeBuilder_ == null ? createTime_ : createTimeBuilder_.build();
+        to_bitField0_ |= 0x00000001;
       }
       if (((from_bitField0_ & 0x00000080) != 0)) {
         result.updateTime_ = updateTimeBuilder_ == null ? updateTime_ : updateTimeBuilder_.build();
+        to_bitField0_ |= 0x00000002;
       }
       if (((from_bitField0_ & 0x00000100) != 0)) {
         result.deleteTime_ = deleteTimeBuilder_ == null ? deleteTime_ : deleteTimeBuilder_.build();
+        to_bitField0_ |= 0x00000004;
       }
       if (((from_bitField0_ & 0x00000400) != 0)) {
         result.managingAuthority_ = managingAuthority_;
       }
+      result.bitField0_ |= to_bitField0_;
     }
 
     @java.lang.Override
@@ -2327,8 +2349,10 @@ public Builder mergeCreateTime(com.google.protobuf.Timestamp value) {
       } else {
         createTimeBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000040;
-      onChanged();
+      if (createTime_ != null) {
+        bitField0_ |= 0x00000040;
+        onChanged();
+      }
       return this;
     }
     /**
@@ -2528,8 +2552,10 @@ public Builder mergeUpdateTime(com.google.protobuf.Timestamp value) {
       } else {
         updateTimeBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000080;
-      onChanged();
+      if (updateTime_ != null) {
+        bitField0_ |= 0x00000080;
+        onChanged();
+      }
       return this;
     }
     /**
@@ -2729,8 +2755,10 @@ public Builder mergeDeleteTime(com.google.protobuf.Timestamp value) {
       } else {
         deleteTimeBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000100;
-      onChanged();
+      if (deleteTime_ != null) {
+        bitField0_ |= 0x00000100;
+        onChanged();
+      }
       return this;
     }
     /**
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyOperationMetadata.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyOperationMetadata.java
index 1c91456cb8..11275b2b49 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyOperationMetadata.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyOperationMetadata.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 /**
@@ -60,6 +61,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
             com.google.iam.v2.PolicyOperationMetadata.Builder.class);
   }
 
+  private int bitField0_;
   public static final int CREATE_TIME_FIELD_NUMBER = 1;
   private com.google.protobuf.Timestamp createTime_;
   /**
@@ -75,7 +77,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    */
   @java.lang.Override
   public boolean hasCreateTime() {
-    return createTime_ != null;
+    return ((bitField0_ & 0x00000001) != 0);
   }
   /**
    *
@@ -120,7 +122,7 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (createTime_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(1, getCreateTime());
     }
     getUnknownFields().writeTo(output);
@@ -132,7 +134,7 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (createTime_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getCreateTime());
     }
     size += getUnknownFields().getSerializedSize();
@@ -299,10 +301,19 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     }
 
     // Construct using com.google.iam.v2.PolicyOperationMetadata.newBuilder()
-    private Builder() {}
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
 
     private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
       super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getCreateTimeFieldBuilder();
+      }
     }
 
     @java.lang.Override
@@ -350,9 +361,12 @@ public com.google.iam.v2.PolicyOperationMetadata buildPartial() {
 
     private void buildPartial0(com.google.iam.v2.PolicyOperationMetadata result) {
       int from_bitField0_ = bitField0_;
+      int to_bitField0_ = 0;
       if (((from_bitField0_ & 0x00000001) != 0)) {
         result.createTime_ = createTimeBuilder_ == null ? createTime_ : createTimeBuilder_.build();
+        to_bitField0_ |= 0x00000001;
       }
+      result.bitField0_ |= to_bitField0_;
     }
 
     @java.lang.Override
@@ -556,8 +570,10 @@ public Builder mergeCreateTime(com.google.protobuf.Timestamp value) {
       } else {
         createTimeBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000001;
-      onChanged();
+      if (createTime_ != null) {
+        bitField0_ |= 0x00000001;
+        onChanged();
+      }
       return this;
     }
     /**
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyOperationMetadataOrBuilder.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyOperationMetadataOrBuilder.java
index 902e8200cd..ebd4fddf0c 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyOperationMetadataOrBuilder.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyOperationMetadataOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 public interface PolicyOperationMetadataOrBuilder
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyOrBuilder.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyOrBuilder.java
index 8e87db6374..a2d006d147 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyOrBuilder.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 public interface PolicyOrBuilder
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyProto.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyProto.java
index e8933f1a0c..2d6d2304aa 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyProto.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyProto.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 public final class PolicyProto {
@@ -81,59 +82,58 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "e/api/client.proto\032\037google/api/field_beh"
           + "avior.proto\032\030google/iam/v2/deny.proto\032#g"
           + "oogle/longrunning/operations.proto\032\037goog"
-          + "le/protobuf/timestamp.proto\"\311\003\n\006Policy\022\022"
-          + "\n\004name\030\001 \001(\tB\004\342A\001\005\022\021\n\003uid\030\002 \001(\tB\004\342A\001\005\022\022\n"
-          + "\004kind\030\003 \001(\tB\004\342A\001\003\022\024\n\014display_name\030\004 \001(\t\022"
-          + ";\n\013annotations\030\005 \003(\0132&.google.iam.v2.Pol"
-          + "icy.AnnotationsEntry\022\014\n\004etag\030\006 \001(\t\0225\n\013cr"
-          + "eate_time\030\007 \001(\0132\032.google.protobuf.Timest"
-          + "ampB\004\342A\001\003\0225\n\013update_time\030\010 \001(\0132\032.google."
-          + "protobuf.TimestampB\004\342A\001\003\0225\n\013delete_time\030"
-          + "\t \001(\0132\032.google.protobuf.TimestampB\004\342A\001\003\022"
-          + "(\n\005rules\030\n \003(\0132\031.google.iam.v2.PolicyRul"
-          + "e\022 \n\022managing_authority\030\013 \001(\tB\004\342A\001\005\0322\n\020A"
-          + "nnotationsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 "
-          + "\001(\t:\0028\001\"W\n\nPolicyRule\022,\n\tdeny_rule\030\002 \001(\013"
-          + "2\027.google.iam.v2.DenyRuleH\000\022\023\n\013descripti"
-          + "on\030\001 \001(\tB\006\n\004kind\"R\n\023ListPoliciesRequest\022"
-          + "\024\n\006parent\030\001 \001(\tB\004\342A\001\002\022\021\n\tpage_size\030\002 \001(\005"
-          + "\022\022\n\npage_token\030\003 \001(\t\"X\n\024ListPoliciesResp"
-          + "onse\022\'\n\010policies\030\001 \003(\0132\025.google.iam.v2.P"
-          + "olicy\022\027\n\017next_page_token\030\002 \001(\t\"&\n\020GetPol"
-          + "icyRequest\022\022\n\004name\030\001 \001(\tB\004\342A\001\002\"k\n\023Create"
-          + "PolicyRequest\022\024\n\006parent\030\001 \001(\tB\004\342A\001\002\022+\n\006p"
-          + "olicy\030\002 \001(\0132\025.google.iam.v2.PolicyB\004\342A\001\002"
-          + "\022\021\n\tpolicy_id\030\003 \001(\t\"B\n\023UpdatePolicyReque"
-          + "st\022+\n\006policy\030\001 \001(\0132\025.google.iam.v2.Polic"
-          + "yB\004\342A\001\002\"=\n\023DeletePolicyRequest\022\022\n\004name\030\001"
-          + " \001(\tB\004\342A\001\002\022\022\n\004etag\030\002 \001(\tB\004\342A\001\001\"J\n\027Policy"
-          + "OperationMetadata\022/\n\013create_time\030\001 \001(\0132\032"
-          + ".google.protobuf.Timestamp2\320\006\n\010Policies\022"
-          + "\203\001\n\014ListPolicies\022\".google.iam.v2.ListPol"
-          + "iciesRequest\032#.google.iam.v2.ListPolicie"
-          + "sResponse\"*\332A\006parent\202\323\344\223\002\033\022\031/v2/{parent="
-          + "policies/*/*}\022m\n\tGetPolicy\022\037.google.iam."
-          + "v2.GetPolicyRequest\032\025.google.iam.v2.Poli"
-          + "cy\"(\332A\004name\202\323\344\223\002\033\022\031/v2/{name=policies/*/"
-          + "*/*}\022\272\001\n\014CreatePolicy\022\".google.iam.v2.Cr"
-          + "eatePolicyRequest\032\035.google.longrunning.O"
-          + "peration\"g\312A!\n\006Policy\022\027PolicyOperationMe"
-          + "tadata\332A\027parent,policy,policy_id\202\323\344\223\002#\"\031"
-          + "/v2/{parent=policies/*/*}:\006policy\022\247\001\n\014Up"
-          + "datePolicy\022\".google.iam.v2.UpdatePolicyR"
-          + "equest\032\035.google.longrunning.Operation\"T\312"
-          + "A!\n\006Policy\022\027PolicyOperationMetadata\202\323\344\223\002"
-          + "*\032 /v2/{policy.name=policies/*/*/*}:\006pol"
-          + "icy\022\237\001\n\014DeletePolicy\022\".google.iam.v2.Del"
-          + "etePolicyRequest\032\035.google.longrunning.Op"
-          + "eration\"L\312A!\n\006Policy\022\027PolicyOperationMet"
-          + "adata\332A\004name\202\323\344\223\002\033*\031/v2/{name=policies/*"
-          + "/*/*}\032F\312A\022iam.googleapis.com\322A.https://w"
-          + "ww.googleapis.com/auth/cloud-platformBy\n"
-          + "\021com.google.iam.v2B\013PolicyProtoP\001Z)cloud"
-          + ".google.com/go/iam/apiv2/iampb;iampb\252\002\023G"
-          + "oogle.Cloud.Iam.V2\312\002\023Google\\Cloud\\Iam\\V2"
-          + "b\006proto3"
+          + "le/protobuf/timestamp.proto\"\302\003\n\006Policy\022\021"
+          + "\n\004name\030\001 \001(\tB\003\340A\005\022\020\n\003uid\030\002 \001(\tB\003\340A\005\022\021\n\004k"
+          + "ind\030\003 \001(\tB\003\340A\003\022\024\n\014display_name\030\004 \001(\t\022;\n\013"
+          + "annotations\030\005 \003(\0132&.google.iam.v2.Policy"
+          + ".AnnotationsEntry\022\014\n\004etag\030\006 \001(\t\0224\n\013creat"
+          + "e_time\030\007 \001(\0132\032.google.protobuf.Timestamp"
+          + "B\003\340A\003\0224\n\013update_time\030\010 \001(\0132\032.google.prot"
+          + "obuf.TimestampB\003\340A\003\0224\n\013delete_time\030\t \001(\013"
+          + "2\032.google.protobuf.TimestampB\003\340A\003\022(\n\005rul"
+          + "es\030\n \003(\0132\031.google.iam.v2.PolicyRule\022\037\n\022m"
+          + "anaging_authority\030\013 \001(\tB\003\340A\005\0322\n\020Annotati"
+          + "onsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001"
+          + "\"W\n\nPolicyRule\022,\n\tdeny_rule\030\002 \001(\0132\027.goog"
+          + "le.iam.v2.DenyRuleH\000\022\023\n\013description\030\001 \001("
+          + "\tB\006\n\004kind\"Q\n\023ListPoliciesRequest\022\023\n\006pare"
+          + "nt\030\001 \001(\tB\003\340A\002\022\021\n\tpage_size\030\002 \001(\005\022\022\n\npage"
+          + "_token\030\003 \001(\t\"X\n\024ListPoliciesResponse\022\'\n\010"
+          + "policies\030\001 \003(\0132\025.google.iam.v2.Policy\022\027\n"
+          + "\017next_page_token\030\002 \001(\t\"%\n\020GetPolicyReque"
+          + "st\022\021\n\004name\030\001 \001(\tB\003\340A\002\"i\n\023CreatePolicyReq"
+          + "uest\022\023\n\006parent\030\001 \001(\tB\003\340A\002\022*\n\006policy\030\002 \001("
+          + "\0132\025.google.iam.v2.PolicyB\003\340A\002\022\021\n\tpolicy_"
+          + "id\030\003 \001(\t\"A\n\023UpdatePolicyRequest\022*\n\006polic"
+          + "y\030\001 \001(\0132\025.google.iam.v2.PolicyB\003\340A\002\";\n\023D"
+          + "eletePolicyRequest\022\021\n\004name\030\001 \001(\tB\003\340A\002\022\021\n"
+          + "\004etag\030\002 \001(\tB\003\340A\001\"J\n\027PolicyOperationMetad"
+          + "ata\022/\n\013create_time\030\001 \001(\0132\032.google.protob"
+          + "uf.Timestamp2\320\006\n\010Policies\022\203\001\n\014ListPolici"
+          + "es\022\".google.iam.v2.ListPoliciesRequest\032#"
+          + ".google.iam.v2.ListPoliciesResponse\"*\332A\006"
+          + "parent\202\323\344\223\002\033\022\031/v2/{parent=policies/*/*}\022"
+          + "m\n\tGetPolicy\022\037.google.iam.v2.GetPolicyRe"
+          + "quest\032\025.google.iam.v2.Policy\"(\332A\004name\202\323\344"
+          + "\223\002\033\022\031/v2/{name=policies/*/*/*}\022\272\001\n\014Creat"
+          + "ePolicy\022\".google.iam.v2.CreatePolicyRequ"
+          + "est\032\035.google.longrunning.Operation\"g\312A!\n"
+          + "\006Policy\022\027PolicyOperationMetadata\332A\027paren"
+          + "t,policy,policy_id\202\323\344\223\002#\"\031/v2/{parent=po"
+          + "licies/*/*}:\006policy\022\247\001\n\014UpdatePolicy\022\".g"
+          + "oogle.iam.v2.UpdatePolicyRequest\032\035.googl"
+          + "e.longrunning.Operation\"T\312A!\n\006Policy\022\027Po"
+          + "licyOperationMetadata\202\323\344\223\002*\032 /v2/{policy"
+          + ".name=policies/*/*/*}:\006policy\022\237\001\n\014Delete"
+          + "Policy\022\".google.iam.v2.DeletePolicyReque"
+          + "st\032\035.google.longrunning.Operation\"L\312A!\n\006"
+          + "Policy\022\027PolicyOperationMetadata\332A\004name\202\323"
+          + "\344\223\002\033*\031/v2/{name=policies/*/*/*}\032F\312A\022iam."
+          + "googleapis.com\322A.https://www.googleapis."
+          + "com/auth/cloud-platformBy\n\021com.google.ia"
+          + "m.v2B\013PolicyProtoP\001Z)cloud.google.com/go"
+          + "/iam/apiv2/iampb;iampb\252\002\023Google.Cloud.Ia"
+          + "m.V2\312\002\023Google\\Cloud\\Iam\\V2b\006proto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyRule.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyRule.java
index da2a6fce90..df1565d49f 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyRule.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyRule.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 /**
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyRuleOrBuilder.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyRuleOrBuilder.java
index d3c32e76c7..8b45ef22c6 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyRuleOrBuilder.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/PolicyRuleOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 public interface PolicyRuleOrBuilder
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/UpdatePolicyRequest.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/UpdatePolicyRequest.java
index c4de3e992b..a6f0e0dd23 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/UpdatePolicyRequest.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/UpdatePolicyRequest.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 /**
@@ -60,6 +61,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
             com.google.iam.v2.UpdatePolicyRequest.Builder.class);
   }
 
+  private int bitField0_;
   public static final int POLICY_FIELD_NUMBER = 1;
   private com.google.iam.v2.Policy policy_;
   /**
@@ -79,7 +81,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    */
   @java.lang.Override
   public boolean hasPolicy() {
-    return policy_ != null;
+    return ((bitField0_ & 0x00000001) != 0);
   }
   /**
    *
@@ -132,7 +134,7 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (policy_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(1, getPolicy());
     }
     getUnknownFields().writeTo(output);
@@ -144,7 +146,7 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (policy_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getPolicy());
     }
     size += getUnknownFields().getSerializedSize();
@@ -309,10 +311,19 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     }
 
     // Construct using com.google.iam.v2.UpdatePolicyRequest.newBuilder()
-    private Builder() {}
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
 
     private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
       super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getPolicyFieldBuilder();
+      }
     }
 
     @java.lang.Override
@@ -360,9 +371,12 @@ public com.google.iam.v2.UpdatePolicyRequest buildPartial() {
 
     private void buildPartial0(com.google.iam.v2.UpdatePolicyRequest result) {
       int from_bitField0_ = bitField0_;
+      int to_bitField0_ = 0;
       if (((from_bitField0_ & 0x00000001) != 0)) {
         result.policy_ = policyBuilder_ == null ? policy_ : policyBuilder_.build();
+        to_bitField0_ |= 0x00000001;
       }
+      result.bitField0_ |= to_bitField0_;
     }
 
     @java.lang.Override
@@ -584,8 +598,10 @@ public Builder mergePolicy(com.google.iam.v2.Policy value) {
       } else {
         policyBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000001;
-      onChanged();
+      if (policy_ != null) {
+        bitField0_ |= 0x00000001;
+        onChanged();
+      }
       return this;
     }
     /**
diff --git a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/UpdatePolicyRequestOrBuilder.java b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/UpdatePolicyRequestOrBuilder.java
index 3a26ee64ee..a101f37edc 100644
--- a/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/UpdatePolicyRequestOrBuilder.java
+++ b/java-iam/proto-google-iam-v2/src/main/java/com/google/iam/v2/UpdatePolicyRequestOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2;
 
 public interface UpdatePolicyRequestOrBuilder
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/CreatePolicyRequest.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/CreatePolicyRequest.java
index 8bfee5bdb3..2087ddaf05 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/CreatePolicyRequest.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/CreatePolicyRequest.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 /**
@@ -63,6 +64,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
             com.google.iam.v2beta.CreatePolicyRequest.Builder.class);
   }
 
+  private int bitField0_;
   public static final int PARENT_FIELD_NUMBER = 1;
 
   @SuppressWarnings("serial")
@@ -149,7 +151,7 @@ public com.google.protobuf.ByteString getParentBytes() {
    */
   @java.lang.Override
   public boolean hasPolicy() {
-    return policy_ != null;
+    return ((bitField0_ & 0x00000001) != 0);
   }
   /**
    *
@@ -254,7 +256,7 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(parent_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 1, parent_);
     }
-    if (policy_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(2, getPolicy());
     }
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(policyId_)) {
@@ -272,7 +274,7 @@ public int getSerializedSize() {
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(parent_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, parent_);
     }
-    if (policy_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getPolicy());
     }
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(policyId_)) {
@@ -448,10 +450,19 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     }
 
     // Construct using com.google.iam.v2beta.CreatePolicyRequest.newBuilder()
-    private Builder() {}
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
 
     private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
       super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getPolicyFieldBuilder();
+      }
     }
 
     @java.lang.Override
@@ -504,12 +515,15 @@ private void buildPartial0(com.google.iam.v2beta.CreatePolicyRequest result) {
       if (((from_bitField0_ & 0x00000001) != 0)) {
         result.parent_ = parent_;
       }
+      int to_bitField0_ = 0;
       if (((from_bitField0_ & 0x00000002) != 0)) {
         result.policy_ = policyBuilder_ == null ? policy_ : policyBuilder_.build();
+        to_bitField0_ |= 0x00000001;
       }
       if (((from_bitField0_ & 0x00000004) != 0)) {
         result.policyId_ = policyId_;
       }
+      result.bitField0_ |= to_bitField0_;
     }
 
     @java.lang.Override
@@ -889,8 +903,10 @@ public Builder mergePolicy(com.google.iam.v2beta.Policy value) {
       } else {
         policyBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000002;
-      onChanged();
+      if (policy_ != null) {
+        bitField0_ |= 0x00000002;
+        onChanged();
+      }
       return this;
     }
     /**
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/CreatePolicyRequestOrBuilder.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/CreatePolicyRequestOrBuilder.java
index 51a7e57106..5ef58e0d02 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/CreatePolicyRequestOrBuilder.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/CreatePolicyRequestOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 public interface CreatePolicyRequestOrBuilder
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DeletePolicyRequest.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DeletePolicyRequest.java
index 45c3eece78..b03d51c0e2 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DeletePolicyRequest.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DeletePolicyRequest.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 /**
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DeletePolicyRequestOrBuilder.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DeletePolicyRequestOrBuilder.java
index 101572706d..787b6b080b 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DeletePolicyRequestOrBuilder.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DeletePolicyRequestOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 public interface DeletePolicyRequestOrBuilder
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DenyRule.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DenyRule.java
index c3e7ce1587..86eef3e734 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DenyRule.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DenyRule.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/deny.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 /**
@@ -64,6 +65,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
             com.google.iam.v2beta.DenyRule.class, com.google.iam.v2beta.DenyRule.Builder.class);
   }
 
+  private int bitField0_;
   public static final int DENIED_PRINCIPALS_FIELD_NUMBER = 1;
 
   @SuppressWarnings("serial")
@@ -565,7 +567,7 @@ public com.google.protobuf.ByteString getExceptionPermissionsBytes(int index) {
    */
   @java.lang.Override
   public boolean hasDenialCondition() {
-    return denialCondition_ != null;
+    return ((bitField0_ & 0x00000001) != 0);
   }
   /**
    *
@@ -643,7 +645,7 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
       com.google.protobuf.GeneratedMessageV3.writeString(
           output, 4, exceptionPermissions_.getRaw(i));
     }
-    if (denialCondition_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(5, getDenialCondition());
     }
     getUnknownFields().writeTo(output);
@@ -687,7 +689,7 @@ public int getSerializedSize() {
       size += dataSize;
       size += 1 * getExceptionPermissionsList().size();
     }
-    if (denialCondition_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(5, getDenialCondition());
     }
     size += getUnknownFields().getSerializedSize();
@@ -871,10 +873,19 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     }
 
     // Construct using com.google.iam.v2beta.DenyRule.newBuilder()
-    private Builder() {}
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
 
     private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
       super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getDenialConditionFieldBuilder();
+      }
     }
 
     @java.lang.Override
@@ -941,10 +952,13 @@ private void buildPartial0(com.google.iam.v2beta.DenyRule result) {
         exceptionPermissions_.makeImmutable();
         result.exceptionPermissions_ = exceptionPermissions_;
       }
+      int to_bitField0_ = 0;
       if (((from_bitField0_ & 0x00000010) != 0)) {
         result.denialCondition_ =
             denialConditionBuilder_ == null ? denialCondition_ : denialConditionBuilder_.build();
+        to_bitField0_ |= 0x00000001;
       }
+      result.bitField0_ |= to_bitField0_;
     }
 
     @java.lang.Override
@@ -2455,8 +2469,10 @@ public Builder mergeDenialCondition(com.google.type.Expr value) {
       } else {
         denialConditionBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000010;
-      onChanged();
+      if (denialCondition_ != null) {
+        bitField0_ |= 0x00000010;
+        onChanged();
+      }
       return this;
     }
     /**
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DenyRuleOrBuilder.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DenyRuleOrBuilder.java
index 28e0b45b8f..2edcce635d 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DenyRuleOrBuilder.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DenyRuleOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/deny.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 public interface DenyRuleOrBuilder
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DenyRuleProto.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DenyRuleProto.java
index 2f14e35670..d470f81c1f 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DenyRuleProto.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/DenyRuleProto.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/deny.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 public final class DenyRuleProto {
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/GetPolicyRequest.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/GetPolicyRequest.java
index dcf3497554..b261fd4dbc 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/GetPolicyRequest.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/GetPolicyRequest.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 /**
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/GetPolicyRequestOrBuilder.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/GetPolicyRequestOrBuilder.java
index 589313315d..725c4a18b9 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/GetPolicyRequestOrBuilder.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/GetPolicyRequestOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 public interface GetPolicyRequestOrBuilder
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesRequest.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesRequest.java
index d1e880b733..b82547064e 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesRequest.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesRequest.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 /**
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesRequestOrBuilder.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesRequestOrBuilder.java
index 1370a31505..5f413fb349 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesRequestOrBuilder.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesRequestOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 public interface ListPoliciesRequestOrBuilder
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesResponse.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesResponse.java
index 7510ee8933..aa5abb4b96 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesResponse.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesResponse.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 /**
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesResponseOrBuilder.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesResponseOrBuilder.java
index 51d88d35e0..e725ce5d8f 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesResponseOrBuilder.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/ListPoliciesResponseOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 public interface ListPoliciesResponseOrBuilder
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/Policy.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/Policy.java
index 2d50b0fedc..c08798b136 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/Policy.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/Policy.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 /**
@@ -58,7 +59,8 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
 
   @SuppressWarnings({"rawtypes"})
   @java.lang.Override
-  protected com.google.protobuf.MapField internalGetMapField(int number) {
+  protected com.google.protobuf.MapFieldReflectionAccessor internalGetMapFieldReflection(
+      int number) {
     switch (number) {
       case 5:
         return internalGetAnnotations();
@@ -76,6 +78,7 @@ protected com.google.protobuf.MapField internalGetMapField(int number) {
             com.google.iam.v2beta.Policy.class, com.google.iam.v2beta.Policy.Builder.class);
   }
 
+  private int bitField0_;
   public static final int NAME_FIELD_NUMBER = 1;
 
   @SuppressWarnings("serial")
@@ -490,7 +493,7 @@ public com.google.protobuf.ByteString getEtagBytes() {
    */
   @java.lang.Override
   public boolean hasCreateTime() {
-    return createTime_ != null;
+    return ((bitField0_ & 0x00000001) != 0);
   }
   /**
    *
@@ -539,7 +542,7 @@ public com.google.protobuf.TimestampOrBuilder getCreateTimeOrBuilder() {
    */
   @java.lang.Override
   public boolean hasUpdateTime() {
-    return updateTime_ != null;
+    return ((bitField0_ & 0x00000002) != 0);
   }
   /**
    *
@@ -588,7 +591,7 @@ public com.google.protobuf.TimestampOrBuilder getUpdateTimeOrBuilder() {
    */
   @java.lang.Override
   public boolean hasDeleteTime() {
-    return deleteTime_ != null;
+    return ((bitField0_ & 0x00000004) != 0);
   }
   /**
    *
@@ -728,13 +731,13 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(etag_)) {
       com.google.protobuf.GeneratedMessageV3.writeString(output, 6, etag_);
     }
-    if (createTime_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(7, getCreateTime());
     }
-    if (updateTime_ != null) {
+    if (((bitField0_ & 0x00000002) != 0)) {
       output.writeMessage(8, getUpdateTime());
     }
-    if (deleteTime_ != null) {
+    if (((bitField0_ & 0x00000004) != 0)) {
       output.writeMessage(9, getDeleteTime());
     }
     for (int i = 0; i < rules_.size(); i++) {
@@ -774,13 +777,13 @@ public int getSerializedSize() {
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(etag_)) {
       size += com.google.protobuf.GeneratedMessageV3.computeStringSize(6, etag_);
     }
-    if (createTime_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(7, getCreateTime());
     }
-    if (updateTime_ != null) {
+    if (((bitField0_ & 0x00000002) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(8, getUpdateTime());
     }
-    if (deleteTime_ != null) {
+    if (((bitField0_ & 0x00000004) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(9, getDeleteTime());
     }
     for (int i = 0; i < rules_.size(); i++) {
@@ -978,7 +981,8 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     }
 
     @SuppressWarnings({"rawtypes"})
-    protected com.google.protobuf.MapField internalGetMapField(int number) {
+    protected com.google.protobuf.MapFieldReflectionAccessor internalGetMapFieldReflection(
+        int number) {
       switch (number) {
         case 5:
           return internalGetAnnotations();
@@ -988,7 +992,8 @@ protected com.google.protobuf.MapField internalGetMapField(int number) {
     }
 
     @SuppressWarnings({"rawtypes"})
-    protected com.google.protobuf.MapField internalGetMutableMapField(int number) {
+    protected com.google.protobuf.MapFieldReflectionAccessor internalGetMutableMapFieldReflection(
+        int number) {
       switch (number) {
         case 5:
           return internalGetMutableAnnotations();
@@ -1007,10 +1012,22 @@ protected com.google.protobuf.MapField internalGetMutableMapField(int number) {
     }
 
     // Construct using com.google.iam.v2beta.Policy.newBuilder()
-    private Builder() {}
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
 
     private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
       super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getCreateTimeFieldBuilder();
+        getUpdateTimeFieldBuilder();
+        getDeleteTimeFieldBuilder();
+        getRulesFieldBuilder();
+      }
     }
 
     @java.lang.Override
@@ -1111,15 +1128,20 @@ private void buildPartial0(com.google.iam.v2beta.Policy result) {
       if (((from_bitField0_ & 0x00000020) != 0)) {
         result.etag_ = etag_;
       }
+      int to_bitField0_ = 0;
       if (((from_bitField0_ & 0x00000040) != 0)) {
         result.createTime_ = createTimeBuilder_ == null ? createTime_ : createTimeBuilder_.build();
+        to_bitField0_ |= 0x00000001;
       }
       if (((from_bitField0_ & 0x00000080) != 0)) {
         result.updateTime_ = updateTimeBuilder_ == null ? updateTime_ : updateTimeBuilder_.build();
+        to_bitField0_ |= 0x00000002;
       }
       if (((from_bitField0_ & 0x00000100) != 0)) {
         result.deleteTime_ = deleteTimeBuilder_ == null ? deleteTime_ : deleteTimeBuilder_.build();
+        to_bitField0_ |= 0x00000004;
       }
+      result.bitField0_ |= to_bitField0_;
     }
 
     @java.lang.Override
@@ -2252,8 +2274,10 @@ public Builder mergeCreateTime(com.google.protobuf.Timestamp value) {
       } else {
         createTimeBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000040;
-      onChanged();
+      if (createTime_ != null) {
+        bitField0_ |= 0x00000040;
+        onChanged();
+      }
       return this;
     }
     /**
@@ -2453,8 +2477,10 @@ public Builder mergeUpdateTime(com.google.protobuf.Timestamp value) {
       } else {
         updateTimeBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000080;
-      onChanged();
+      if (updateTime_ != null) {
+        bitField0_ |= 0x00000080;
+        onChanged();
+      }
       return this;
     }
     /**
@@ -2654,8 +2680,10 @@ public Builder mergeDeleteTime(com.google.protobuf.Timestamp value) {
       } else {
         deleteTimeBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000100;
-      onChanged();
+      if (deleteTime_ != null) {
+        bitField0_ |= 0x00000100;
+        onChanged();
+      }
       return this;
     }
     /**
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyOperationMetadata.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyOperationMetadata.java
index aec75b94e9..2d63d51cf6 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyOperationMetadata.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyOperationMetadata.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 /**
@@ -60,6 +61,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
             com.google.iam.v2beta.PolicyOperationMetadata.Builder.class);
   }
 
+  private int bitField0_;
   public static final int CREATE_TIME_FIELD_NUMBER = 1;
   private com.google.protobuf.Timestamp createTime_;
   /**
@@ -75,7 +77,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    */
   @java.lang.Override
   public boolean hasCreateTime() {
-    return createTime_ != null;
+    return ((bitField0_ & 0x00000001) != 0);
   }
   /**
    *
@@ -120,7 +122,7 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (createTime_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(1, getCreateTime());
     }
     getUnknownFields().writeTo(output);
@@ -132,7 +134,7 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (createTime_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getCreateTime());
     }
     size += getUnknownFields().getSerializedSize();
@@ -299,10 +301,19 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     }
 
     // Construct using com.google.iam.v2beta.PolicyOperationMetadata.newBuilder()
-    private Builder() {}
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
 
     private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
       super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getCreateTimeFieldBuilder();
+      }
     }
 
     @java.lang.Override
@@ -350,9 +361,12 @@ public com.google.iam.v2beta.PolicyOperationMetadata buildPartial() {
 
     private void buildPartial0(com.google.iam.v2beta.PolicyOperationMetadata result) {
       int from_bitField0_ = bitField0_;
+      int to_bitField0_ = 0;
       if (((from_bitField0_ & 0x00000001) != 0)) {
         result.createTime_ = createTimeBuilder_ == null ? createTime_ : createTimeBuilder_.build();
+        to_bitField0_ |= 0x00000001;
       }
+      result.bitField0_ |= to_bitField0_;
     }
 
     @java.lang.Override
@@ -556,8 +570,10 @@ public Builder mergeCreateTime(com.google.protobuf.Timestamp value) {
       } else {
         createTimeBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000001;
-      onChanged();
+      if (createTime_ != null) {
+        bitField0_ |= 0x00000001;
+        onChanged();
+      }
       return this;
     }
     /**
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyOperationMetadataOrBuilder.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyOperationMetadataOrBuilder.java
index 11fc1dca82..c1e6ecfffa 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyOperationMetadataOrBuilder.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyOperationMetadataOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 public interface PolicyOperationMetadataOrBuilder
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyOrBuilder.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyOrBuilder.java
index 2c6929cd7e..b3eb63526f 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyOrBuilder.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 public interface PolicyOrBuilder
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyProto.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyProto.java
index fab21840a2..3de619c15d 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyProto.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyProto.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 public final class PolicyProto {
@@ -82,59 +83,59 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "ield_behavior.proto\032\034google/iam/v2beta/d"
           + "eny.proto\032#google/longrunning/operations"
           + ".proto\032\037google/protobuf/timestamp.proto\""
-          + "\257\003\n\006Policy\022\022\n\004name\030\001 \001(\tB\004\342A\001\005\022\021\n\003uid\030\002 "
-          + "\001(\tB\004\342A\001\005\022\022\n\004kind\030\003 \001(\tB\004\342A\001\003\022\024\n\014display"
-          + "_name\030\004 \001(\t\022?\n\013annotations\030\005 \003(\0132*.googl"
-          + "e.iam.v2beta.Policy.AnnotationsEntry\022\014\n\004"
-          + "etag\030\006 \001(\t\0225\n\013create_time\030\007 \001(\0132\032.google"
-          + ".protobuf.TimestampB\004\342A\001\003\0225\n\013update_time"
-          + "\030\010 \001(\0132\032.google.protobuf.TimestampB\004\342A\001\003"
-          + "\0225\n\013delete_time\030\t \001(\0132\032.google.protobuf."
-          + "TimestampB\004\342A\001\003\022,\n\005rules\030\n \003(\0132\035.google."
-          + "iam.v2beta.PolicyRule\0322\n\020AnnotationsEntr"
-          + "y\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"[\n\nPol"
-          + "icyRule\0220\n\tdeny_rule\030\002 \001(\0132\033.google.iam."
-          + "v2beta.DenyRuleH\000\022\023\n\013description\030\001 \001(\tB\006"
-          + "\n\004kind\"R\n\023ListPoliciesRequest\022\024\n\006parent\030"
-          + "\001 \001(\tB\004\342A\001\002\022\021\n\tpage_size\030\002 \001(\005\022\022\n\npage_t"
-          + "oken\030\003 \001(\t\"\\\n\024ListPoliciesResponse\022+\n\010po"
-          + "licies\030\001 \003(\0132\031.google.iam.v2beta.Policy\022"
-          + "\027\n\017next_page_token\030\002 \001(\t\"&\n\020GetPolicyReq"
-          + "uest\022\022\n\004name\030\001 \001(\tB\004\342A\001\002\"o\n\023CreatePolicy"
-          + "Request\022\024\n\006parent\030\001 \001(\tB\004\342A\001\002\022/\n\006policy\030"
-          + "\002 \001(\0132\031.google.iam.v2beta.PolicyB\004\342A\001\002\022\021"
-          + "\n\tpolicy_id\030\003 \001(\t\"F\n\023UpdatePolicyRequest"
-          + "\022/\n\006policy\030\001 \001(\0132\031.google.iam.v2beta.Pol"
-          + "icyB\004\342A\001\002\"=\n\023DeletePolicyRequest\022\022\n\004name"
-          + "\030\001 \001(\tB\004\342A\001\002\022\022\n\004etag\030\002 \001(\tB\004\342A\001\001\"J\n\027Poli"
-          + "cyOperationMetadata\022/\n\013create_time\030\001 \001(\013"
-          + "2\032.google.protobuf.Timestamp2\200\007\n\010Policie"
-          + "s\022\217\001\n\014ListPolicies\022&.google.iam.v2beta.L"
-          + "istPoliciesRequest\032\'.google.iam.v2beta.L"
-          + "istPoliciesResponse\".\332A\006parent\202\323\344\223\002\037\022\035/v"
-          + "2beta/{parent=policies/*/*}\022y\n\tGetPolicy"
-          + "\022#.google.iam.v2beta.GetPolicyRequest\032\031."
-          + "google.iam.v2beta.Policy\",\332A\004name\202\323\344\223\002\037\022"
-          + "\035/v2beta/{name=policies/*/*/*}\022\302\001\n\014Creat"
-          + "ePolicy\022&.google.iam.v2beta.CreatePolicy"
-          + "Request\032\035.google.longrunning.Operation\"k"
-          + "\312A!\n\006Policy\022\027PolicyOperationMetadata\332A\027p"
-          + "arent,policy,policy_id\202\323\344\223\002\'\"\035/v2beta/{p"
-          + "arent=policies/*/*}:\006policy\022\257\001\n\014UpdatePo"
-          + "licy\022&.google.iam.v2beta.UpdatePolicyReq"
-          + "uest\032\035.google.longrunning.Operation\"X\312A!"
-          + "\n\006Policy\022\027PolicyOperationMetadata\202\323\344\223\002.\032"
-          + "$/v2beta/{policy.name=policies/*/*/*}:\006p"
-          + "olicy\022\247\001\n\014DeletePolicy\022&.google.iam.v2be"
-          + "ta.DeletePolicyRequest\032\035.google.longrunn"
-          + "ing.Operation\"P\312A!\n\006Policy\022\027PolicyOperat"
-          + "ionMetadata\332A\004name\202\323\344\223\002\037*\035/v2beta/{name="
-          + "policies/*/*/*}\032F\312A\022iam.googleapis.com\322A"
-          + ".https://www.googleapis.com/auth/cloud-p"
-          + "latformB\211\001\n\025com.google.iam.v2betaB\013Polic"
-          + "yProtoP\001Z-cloud.google.com/go/iam/apiv2b"
-          + "eta/iampb;iampb\252\002\027Google.Cloud.Iam.V2Bet"
-          + "a\312\002\027Google\\Cloud\\Iam\\V2betab\006proto3"
+          + "\251\003\n\006Policy\022\021\n\004name\030\001 \001(\tB\003\340A\005\022\020\n\003uid\030\002 \001"
+          + "(\tB\003\340A\005\022\021\n\004kind\030\003 \001(\tB\003\340A\003\022\024\n\014display_na"
+          + "me\030\004 \001(\t\022?\n\013annotations\030\005 \003(\0132*.google.i"
+          + "am.v2beta.Policy.AnnotationsEntry\022\014\n\004eta"
+          + "g\030\006 \001(\t\0224\n\013create_time\030\007 \001(\0132\032.google.pr"
+          + "otobuf.TimestampB\003\340A\003\0224\n\013update_time\030\010 \001"
+          + "(\0132\032.google.protobuf.TimestampB\003\340A\003\0224\n\013d"
+          + "elete_time\030\t \001(\0132\032.google.protobuf.Times"
+          + "tampB\003\340A\003\022,\n\005rules\030\n \003(\0132\035.google.iam.v2"
+          + "beta.PolicyRule\0322\n\020AnnotationsEntry\022\013\n\003k"
+          + "ey\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"[\n\nPolicyRul"
+          + "e\0220\n\tdeny_rule\030\002 \001(\0132\033.google.iam.v2beta"
+          + ".DenyRuleH\000\022\023\n\013description\030\001 \001(\tB\006\n\004kind"
+          + "\"Q\n\023ListPoliciesRequest\022\023\n\006parent\030\001 \001(\tB"
+          + "\003\340A\002\022\021\n\tpage_size\030\002 \001(\005\022\022\n\npage_token\030\003 "
+          + "\001(\t\"\\\n\024ListPoliciesResponse\022+\n\010policies\030"
+          + "\001 \003(\0132\031.google.iam.v2beta.Policy\022\027\n\017next"
+          + "_page_token\030\002 \001(\t\"%\n\020GetPolicyRequest\022\021\n"
+          + "\004name\030\001 \001(\tB\003\340A\002\"m\n\023CreatePolicyRequest\022"
+          + "\023\n\006parent\030\001 \001(\tB\003\340A\002\022.\n\006policy\030\002 \001(\0132\031.g"
+          + "oogle.iam.v2beta.PolicyB\003\340A\002\022\021\n\tpolicy_i"
+          + "d\030\003 \001(\t\"E\n\023UpdatePolicyRequest\022.\n\006policy"
+          + "\030\001 \001(\0132\031.google.iam.v2beta.PolicyB\003\340A\002\";"
+          + "\n\023DeletePolicyRequest\022\021\n\004name\030\001 \001(\tB\003\340A\002"
+          + "\022\021\n\004etag\030\002 \001(\tB\003\340A\001\"J\n\027PolicyOperationMe"
+          + "tadata\022/\n\013create_time\030\001 \001(\0132\032.google.pro"
+          + "tobuf.Timestamp2\200\007\n\010Policies\022\217\001\n\014ListPol"
+          + "icies\022&.google.iam.v2beta.ListPoliciesRe"
+          + "quest\032\'.google.iam.v2beta.ListPoliciesRe"
+          + "sponse\".\332A\006parent\202\323\344\223\002\037\022\035/v2beta/{parent"
+          + "=policies/*/*}\022y\n\tGetPolicy\022#.google.iam"
+          + ".v2beta.GetPolicyRequest\032\031.google.iam.v2"
+          + "beta.Policy\",\332A\004name\202\323\344\223\002\037\022\035/v2beta/{nam"
+          + "e=policies/*/*/*}\022\302\001\n\014CreatePolicy\022&.goo"
+          + "gle.iam.v2beta.CreatePolicyRequest\032\035.goo"
+          + "gle.longrunning.Operation\"k\312A!\n\006Policy\022\027"
+          + "PolicyOperationMetadata\332A\027parent,policy,"
+          + "policy_id\202\323\344\223\002\'\"\035/v2beta/{parent=policie"
+          + "s/*/*}:\006policy\022\257\001\n\014UpdatePolicy\022&.google"
+          + ".iam.v2beta.UpdatePolicyRequest\032\035.google"
+          + ".longrunning.Operation\"X\312A!\n\006Policy\022\027Pol"
+          + "icyOperationMetadata\202\323\344\223\002.\032$/v2beta/{pol"
+          + "icy.name=policies/*/*/*}:\006policy\022\247\001\n\014Del"
+          + "etePolicy\022&.google.iam.v2beta.DeletePoli"
+          + "cyRequest\032\035.google.longrunning.Operation"
+          + "\"P\312A!\n\006Policy\022\027PolicyOperationMetadata\332A"
+          + "\004name\202\323\344\223\002\037*\035/v2beta/{name=policies/*/*/"
+          + "*}\032F\312A\022iam.googleapis.com\322A.https://www."
+          + "googleapis.com/auth/cloud-platformB\211\001\n\025c"
+          + "om.google.iam.v2betaB\013PolicyProtoP\001Z-clo"
+          + "ud.google.com/go/iam/apiv2beta/iampb;iam"
+          + "pb\252\002\027Google.Cloud.Iam.V2Beta\312\002\027Google\\Cl"
+          + "oud\\Iam\\V2betab\006proto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyRule.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyRule.java
index 1f68e133bc..9862026d77 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyRule.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyRule.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 /**
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyRuleOrBuilder.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyRuleOrBuilder.java
index f6463abdbb..210e966b1e 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyRuleOrBuilder.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/PolicyRuleOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 public interface PolicyRuleOrBuilder
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/UpdatePolicyRequest.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/UpdatePolicyRequest.java
index f7b368d981..9a72bea366 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/UpdatePolicyRequest.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/UpdatePolicyRequest.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 /**
@@ -60,6 +61,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
             com.google.iam.v2beta.UpdatePolicyRequest.Builder.class);
   }
 
+  private int bitField0_;
   public static final int POLICY_FIELD_NUMBER = 1;
   private com.google.iam.v2beta.Policy policy_;
   /**
@@ -79,7 +81,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    */
   @java.lang.Override
   public boolean hasPolicy() {
-    return policy_ != null;
+    return ((bitField0_ & 0x00000001) != 0);
   }
   /**
    *
@@ -132,7 +134,7 @@ public final boolean isInitialized() {
 
   @java.lang.Override
   public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-    if (policy_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(1, getPolicy());
     }
     getUnknownFields().writeTo(output);
@@ -144,7 +146,7 @@ public int getSerializedSize() {
     if (size != -1) return size;
 
     size = 0;
-    if (policy_ != null) {
+    if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getPolicy());
     }
     size += getUnknownFields().getSerializedSize();
@@ -311,10 +313,19 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     }
 
     // Construct using com.google.iam.v2beta.UpdatePolicyRequest.newBuilder()
-    private Builder() {}
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
 
     private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
       super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders) {
+        getPolicyFieldBuilder();
+      }
     }
 
     @java.lang.Override
@@ -362,9 +373,12 @@ public com.google.iam.v2beta.UpdatePolicyRequest buildPartial() {
 
     private void buildPartial0(com.google.iam.v2beta.UpdatePolicyRequest result) {
       int from_bitField0_ = bitField0_;
+      int to_bitField0_ = 0;
       if (((from_bitField0_ & 0x00000001) != 0)) {
         result.policy_ = policyBuilder_ == null ? policy_ : policyBuilder_.build();
+        to_bitField0_ |= 0x00000001;
       }
+      result.bitField0_ |= to_bitField0_;
     }
 
     @java.lang.Override
@@ -586,8 +600,10 @@ public Builder mergePolicy(com.google.iam.v2beta.Policy value) {
       } else {
         policyBuilder_.mergeFrom(value);
       }
-      bitField0_ |= 0x00000001;
-      onChanged();
+      if (policy_ != null) {
+        bitField0_ |= 0x00000001;
+        onChanged();
+      }
       return this;
     }
     /**
diff --git a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/UpdatePolicyRequestOrBuilder.java b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/UpdatePolicyRequestOrBuilder.java
index 231607713a..eace2e41e1 100644
--- a/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/UpdatePolicyRequestOrBuilder.java
+++ b/java-iam/proto-google-iam-v2beta/src/main/java/com/google/iam/v2beta/UpdatePolicyRequestOrBuilder.java
@@ -16,6 +16,7 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: google/iam/v2beta/policy.proto
 
+// Protobuf Java Version: 3.25.2
 package com.google.iam.v2beta;
 
 public interface UpdatePolicyRequestOrBuilder