public Builder clear() {
        super.clear();
        wsOpCode_ = "";

        messageId_ = com.google.protobuf.LazyStringArrayList.EMPTY;
        bitField0_ = (bitField0_ & ~0x00000002);
        userId_ = "";

        return this;
      }
Protobuf type {@code org.anychat.protobuf.ws.UserMessageReceiveC}
AnyChatServer/src/main/java/org/anychat/protobuf/ws/LoginChatProto.java