public Builder setStepValidateRequest(
          main.Messages.StepValidateRequest.Builder builderForValue) {
        if (stepValidateRequestBuilder_ == null) {
          stepValidateRequest_ = builderForValue.build();
          onChanged();
        } else {
          stepValidateRequestBuilder_.setMessage(builderForValue.build());
        }
        bitField0_ |= 0x00000400;
        return this;
      }