public Builder mergeFrom(JSystemPiqi.system_error other) {
        if (other == JSystemPiqi.system_error.getDefaultInstance()) return this;
        if (other.hasCode()) {
          setCode(other.getCode());
        }
        if (other.hasDescription()) {
          setDescription(other.getDescription());
        }
        this.mergeUnknownFields(other.getUnknownFields());
        return this;
      }