private com.google.protobuf.SingleFieldBuilderV3<
            com.google.type.TimeZone,
            com.google.type.TimeZone.Builder,
            com.google.type.TimeZoneOrBuilder>
        getTimeZoneFieldBuilder() {
      if (timeZoneBuilder_ == null) {
        if (!(timeOffsetCase_ == 3)) {
          timeOffset_ = com.google.type.TimeZone.getDefaultInstance();
        }
        timeZoneBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.type.TimeZone,
                com.google.type.TimeZone.Builder,
                com.google.type.TimeZoneOrBuilder>(
                (com.google.type.TimeZone) timeOffset_, getParentForChildren(), isClean());
        timeOffset_ = null;
      }
      timeOffsetCase_ = 3;
      onChanged();
      return timeZoneBuilder_;
    }
<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