private com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Duration,
            com.google.protobuf.Duration.Builder,
            com.google.protobuf.DurationOrBuilder>
        getAdTimeOffsetFieldBuilder() {
      if (adTimeOffsetBuilder_ == null) {
        adTimeOffsetBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.protobuf.Duration,
                com.google.protobuf.Duration.Builder,
                com.google.protobuf.DurationOrBuilder>(
                getAdTimeOffset(), getParentForChildren(), isClean());
        adTimeOffset_ = null;
      }
      return adTimeOffsetBuilder_;
    }
<pre>
Required. The time offset of the processed ad.
</pre>

<code>.google.protobuf.Duration ad_time_offset = 3 [(.google.api.field_behavior) = REQUIRED];
</code>
java-video-stitcher/proto-google-cloud-video-stitcher-v1/src/main/java/com/google/cloud/video/stitcher/v1/AdStitchDetail.java