public Builder clearTimeZone() {
      if (timeZoneBuilder_ == null) {
        if (timeOffsetCase_ == 3) {
          timeOffsetCase_ = 0;
          timeOffset_ = null;
          onChanged();
        }
      } else {
        if (timeOffsetCase_ == 3) {
          timeOffsetCase_ = 0;
          timeOffset_ = null;
        }
        timeZoneBuilder_.clear();
      }
      return this;
    }
<pre>
Time zone e.g. "America/Los_Angeles".
</pre>

<code>.google.type.TimeZone time_zone = 3;</code>
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/TimecodeConfig.java