Adds method property in shipping class

src/main/java/com/checkout/payments/ShippingDetails.java

@@ -2,6 +2,7 @@
 
 import com.checkout.common.Address;
 import com.checkout.common.Phone;
+import com.checkout.sessions.DeliveryTimeframe;
 import com.google.gson.annotations.SerializedName;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
@@ -14,11 +15,26 @@
 @AllArgsConstructor
 public final class ShippingDetails {
 
+    @SerializedName("first_name")
+    private String firstName;
+
+    @SerializedName("last_name")
+    private String lastName;
+
+    @SerializedName("email")
+    private String email;
+
     private Address address;
 
     private Phone phone;
 
     @SerializedName("from_address_zip")
     private String fromAddressZip;
+
+    @SerializedName("timeframe")
+    private ShippingDetailsTimeframe timeFrame;
+
+    @SerializedName("method")
+    private ShippingDetailsMethods method;
 
 }

src/main/java/com/checkout/payments/ShippingDetailsMethods.java

@@ -0,0 +1,18 @@
+package com.checkout.payments;
+
+import com.google.gson.annotations.SerializedName;
+
+public enum ShippingDetailsMethods {
+
+    @SerializedName("Digital")
+    DIGITAL,
+
+    @SerializedName("PickUp")
+    PICK_UP,
+
+    @SerializedName("BillingAddress")
+    BILLING_ADDRESS,
+
+    @SerializedName("OtherAddress")
+    OTHER_ADDRESS,
+}

src/main/java/com/checkout/payments/ShippingDetailsTimeframe.java

@@ -0,0 +1,18 @@
+package com.checkout.payments;
+
+import com.google.gson.annotations.SerializedName;
+
+public enum ShippingDetailsTimeframe {
+
+    @SerializedName("ElectronicDelivery")
+    ELECTRONIC_DELIVERY,
+
+    @SerializedName("SameDay")
+    SAME_DAY,
+
+    @SerializedName("Overnight")
+    OVERNIGHT,
+
+    @SerializedName("TwoDayOrMore")
+    TWO_DAY_OR_MORE
+}