@java.lang.Override
  public Builder toBuilder() {
    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
  }
<pre>
If set, returns a message specifying which part of the speech adaptation
request timed out.
</pre>

<code>string timeout_message = 4;</code>

@return The bytes for timeoutMessage.
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/SpeechAdaptationInfo.java