public String getId() {
        Object ref = id_;
        if (!(ref instanceof String)) {
          com.google.protobuf.ByteString bs =
              (com.google.protobuf.ByteString) ref;
          String s = bs.toStringUtf8();
          id_ = s;
          return s;
        } else {
          return (String) ref;
        }
      }
<code>string id = 2;</code>
@return The id.
core/src/test/java/com/alibaba/fastjson2/dubbo/GoogleProtobufBasic.java