public Builder setTimeoutMessage(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      timeoutMessage_ = value;
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
<pre>
If set, returns a message specifying which part of the speech adaptation
request timed out.
</pre>

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

@param value The timeoutMessage to set.
@return This builder for chaining.
java-speech/proto-google-cloud-speech-v1/src/main/java/com/google/cloud/speech/v1/SpeechAdaptationInfo.java