Reduce the number of dynamic calls.

lib/src/protobuf/generated_message.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of protobuf;
 
 typedef GeneratedMessage CreateBuilderFunc();
 typedef MakeDefaultFunc();
 typedef ProtobufEnum ValueOfFunc(int value);
 
@@ skipping 49 matching lines @@
 
   /// Clears all data that was set in this message.
   ///
   /// After calling [clear], [getField] will still return default values for
   /// unset fields.
   void clear() => _fieldSet._clear();
 
   // TODO(antonm): move to getters.
   int getTagNumber(String fieldName) => info_.tagNumber(fieldName);
 
-  bool operator ==(other) {
-    if (other is! GeneratedMessage) return false;
-    return _fieldSet._equals(other._fieldSet);
-  }
+  bool operator ==(other) =>
+      other is GeneratedMessage ? _fieldSet._equals(other._fieldSet) : false;
 
   /// Calculates a hash code based on the contents of the protobuf.
   ///
   /// The hash may change when any field changes (recursively).
   /// Therefore, protobufs used as map keys shouldn't be changed.
   int get hashCode => _fieldSet._hashCode;
 
   /// Returns a String representation of this message.
   ///
   /// This representation is similar to, but not quite, the Protocol Buffer
@@ skipping 234 matching lines @@
     if (value == null || !_isUnsigned32(value)) {
       _fieldSet._$check(tagNumber, value);
     }
     _fieldSet._$set(index, tagNumber, value);
   }
 
   /// For generated code only.
   void $_setInt64(int index, int tagNumber, Int64 value) =>
       _fieldSet._$set(index, tagNumber, value);
 }