public Builder setBuyItem(
          JSystemPiqi.buy_item_request.Builder builderForValue) {
        if (buyItemBuilder_ == null) {
          buyItem_ = builderForValue.build();
          onChanged();
        } else {
          buyItemBuilder_.setMessage(builderForValue.build());
        }
        bitField0_ |= 0x00000001;
        return this;
      }