public com.google.protobuf.ByteString getAdTagUriBytes() {
      java.lang.Object ref = adTagUri_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        adTagUri_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
The default ad tag associated with this live stream config.
</pre>

<code>string ad_tag_uri = 3;</code>

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