public Builder clearCreateCustomClassRequest() {
      if (createCustomClassRequestBuilder_ == null) {
        if (requestCase_ == 13) {
          requestCase_ = 0;
          request_ = null;
          onChanged();
        }
      } else {
        if (requestCase_ == 13) {
          requestCase_ = 0;
          request_ = null;
        }
        createCustomClassRequestBuilder_.clear();
      }
      return this;
    }
<pre>
The CreateCustomClassRequest that spawned the Operation.
</pre>

<code>.google.cloud.speech.v2.CreateCustomClassRequest create_custom_class_request = 13;
</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/OperationMetadata.java