public Builder setSetupRequest(
        com.google.cloud.visionai.v1.ReceivePacketsRequest.SetupRequest value) {
      if (setupRequestBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        request_ = value;
        onChanged();
      } else {
        setupRequestBuilder_.setMessage(value);
      }
      requestCase_ = 6;
      return this;
    }
<pre>
The request to setup the initial state of session.

The client must send and only send this as the first message.
</pre>

<code>.google.cloud.visionai.v1.ReceivePacketsRequest.SetupRequest setup_request = 6;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/ReceivePacketsRequest.java