Strip metadata fix

metadata/Cargo.toml

@@ -28,7 +28,6 @@ hashbrown = { workspace = true }
 bitvec = { workspace = true, features = ["alloc"] }
 criterion = { workspace = true }
 scale-info = { workspace = true, features = ["bit-vec"] }
-assert_matches = { workspace = true }
 
 [lib]
 # Without this, libtest cli opts interfere with criteron benches:

metadata/src/lib.rs

@@ -340,6 +340,14 @@ impl StorageMetadata {
         self.entries.values()
     }
 
+    /// filter over the storage entries.
+    pub fn retain_entries<F>(&mut self, f: F)
+    where
+        F: FnMut(&StorageEntryMetadata) -> bool,
+    {
+        self.entries.retain(f)
+    }
+
     /// Return a specific storage entry given its name.
     pub fn entry_by_name(&self, name: &str) -> Option<&StorageEntryMetadata> {
         self.entries.get_by_key(name)