public Builder mergeSpeechEventOffset(com.google.protobuf.Duration value) {
      if (speechEventOffsetBuilder_ == null) {
        if (((bitField0_ & 0x00000004) != 0)
            && speechEventOffset_ != null
            && speechEventOffset_ != com.google.protobuf.Duration.getDefaultInstance()) {
          getSpeechEventOffsetBuilder().mergeFrom(value);
        } else {
          speechEventOffset_ = value;
        }
      } else {
        speechEventOffsetBuilder_.mergeFrom(value);
      }
      if (speechEventOffset_ != null) {
        bitField0_ |= 0x00000004;
        onChanged();
      }
      return this;
    }
<pre>
Time offset between the beginning of the audio and event emission.
</pre>

<code>.google.protobuf.Duration speech_event_offset = 7;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/StreamingRecognizeResponse.java