public Builder clearAdTimeOffset() {
      bitField0_ = (bitField0_ & ~0x00000004);
      adTimeOffset_ = null;
      if (adTimeOffsetBuilder_ != null) {
        adTimeOffsetBuilder_.dispose();
        adTimeOffsetBuilder_ = null;
      }
      onChanged();
      return this;
    }
<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