 {           return nestedMessageBuilder_.getMessage();         }       }       /**        * <code>.io.confluent.kafka.serializers.protobuf.test.NestedMessage nested_message = 0;</code>        */       public Builder setNestedMessage(io.confluent.kafka.serializers.protobuf.test.NestedTestProto.NestedMessage value) {         if (nestedMessageBuilder_ == null) {           if (value == null) {             throw new NullPointerException();           }           