public Builder mergeChatList(protocols.ChatProtocol.ChatList value) {
        if (chatListBuilder_ == null) {
          if (((bitField0_ & 0x00000004) == 0x00000004) &&
              chatList_ != protocols.ChatProtocol.ChatList.getDefaultInstance()) {
            chatList_ =
              protocols.ChatProtocol.ChatList.newBuilder(chatList_).mergeFrom(value).buildPartial();
          } else {
            chatList_ = value;
          }
          onChanged();
        } else {
          chatListBuilder_.mergeFrom(value);
        }
        bitField0_ |= 0x00000004;
        return this;
      }