public Builder mergeImage(protocols.ChatProtocol.Image value) {
        if (imageBuilder_ == null) {
          if (((bitField0_ & 0x00000010) == 0x00000010) &&
              image_ != protocols.ChatProtocol.Image.getDefaultInstance()) {
            image_ =
              protocols.ChatProtocol.Image.newBuilder(image_).mergeFrom(value).buildPartial();
          } else {
            image_ = value;
          }
          onChanged();
        } else {
          imageBuilder_.mergeFrom(value);
        }
        bitField0_ |= 0x00000010;
        return this;
      }