public Builder clearSetupRequest() {
      if (setupRequestBuilder_ == null) {
        if (requestCase_ == 6) {
          requestCase_ = 0;
          request_ = null;
          onChanged();
        }
      } else {
        if (requestCase_ == 6) {
          requestCase_ = 0;
          request_ = null;
        }
        setupRequestBuilder_.clear();
      }
      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