private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.visionai.v1.ProcessorIOSpec,
            com.google.cloud.visionai.v1.ProcessorIOSpec.Builder,
            com.google.cloud.visionai.v1.ProcessorIOSpecOrBuilder>
        getProcessorIoSpecFieldBuilder() {
      if (processorIoSpecBuilder_ == null) {
        processorIoSpecBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.visionai.v1.ProcessorIOSpec,
                com.google.cloud.visionai.v1.ProcessorIOSpec.Builder,
                com.google.cloud.visionai.v1.ProcessorIOSpecOrBuilder>(
                getProcessorIoSpec(), getParentForChildren(), isClean());
        processorIoSpec_ = null;
      }
      return processorIoSpecBuilder_;
    }
<pre>
Output only. [Output only] The input / output specifications of a
processor, each type of processor has fixed input / output specs which
cannot be altered by customer.
</pre>

<code>
.google.cloud.visionai.v1.ProcessorIOSpec processor_io_spec = 11 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/Processor.java