public Builder mergeFrom(JSystemPiqi.grant_coins_request other) {
        if (other == JSystemPiqi.grant_coins_request.getDefaultInstance()) return this;
        if (other.hasUserid()) {
          setUserid(other.getUserid());
        }
        if (other.hasCoins()) {
          setCoins(other.getCoins());
        }
        this.mergeUnknownFields(other.getUnknownFields());
        return this;
      }