public Builder clearSpeechEventTime() {
      bitField0_ = (bitField0_ & ~0x00000008);
      speechEventTime_ = null;
      if (speechEventTimeBuilder_ != null) {
        speechEventTimeBuilder_.dispose();
        speechEventTimeBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Time offset between the beginning of the audio and event emission.
</pre>

<code>.google.protobuf.Duration speech_event_time = 8;</code>
java-speech/proto-google-cloud-speech-v1/src/main/java/com/google/cloud/speech/v1/StreamingRecognizeResponse.java