@java.lang.Override
    public com.google.protobuf.ByteString getProducerNodeBytes() {
      java.lang.Object ref = producerNode_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        producerNode_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
The name of graph node who produces the output resource name.
For example:
output_resource:
/projects/123/locations/us-central1/clusters/456/streams/output-application-789-stream-a-occupancy-counting
producer_node: occupancy-counting
</pre>

<code>string producer_node = 2;</code>

@return The bytes for producerNode.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/Instance.java