public com.google.protobuf.ByteString getTimeoutMessageBytes() {
      java.lang.Object ref = timeoutMessage_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        timeoutMessage_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<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