public com.google.protobuf.ByteString getAdIdBytes() {
      java.lang.Object ref = adId_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        adId_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
Required. The ad ID of the processed ad.
</pre>

<code>string ad_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>

@return The bytes for adId.
java-video-stitcher/proto-google-cloud-video-stitcher-v1/src/main/java/com/google/cloud/video/stitcher/v1/AdStitchDetail.java