public Builder mergeSpeechEventTime(com.google.protobuf.Duration value) {
      if (speechEventTimeBuilder_ == null) {
        if (((bitField0_ & 0x00000008) != 0)
            && speechEventTime_ != null
            && speechEventTime_ != com.google.protobuf.Duration.getDefaultInstance()) {
          getSpeechEventTimeBuilder().mergeFrom(value);
        } else {
          speechEventTime_ = value;
        }
      } else {
        speechEventTimeBuilder_.mergeFrom(value);
      }
      if (speechEventTime_ != null) {
        bitField0_ |= 0x00000008;
        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-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/StreamingRecognizeResponse.java