private com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Duration,
            com.google.protobuf.Duration.Builder,
            com.google.protobuf.DurationOrBuilder>
        getUtcOffsetFieldBuilder() {
      if (utcOffsetBuilder_ == null) {
        if (!(timeOffsetCase_ == 2)) {
          timeOffset_ = com.google.protobuf.Duration.getDefaultInstance();
        }
        utcOffsetBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.protobuf.Duration,
                com.google.protobuf.Duration.Builder,
                com.google.protobuf.DurationOrBuilder>(
                (com.google.protobuf.Duration) timeOffset_, getParentForChildren(), isClean());
        timeOffset_ = null;
      }
      timeOffsetCase_ = 2;
      onChanged();
      return utcOffsetBuilder_;
    }
<pre>
UTC offset. Must be whole seconds, between -18 hours and +18 hours.
</pre>

<code>.google.protobuf.Duration utc_offset = 2;</code>
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/TimecodeConfig.java