public static Builder newBuilder() {
    return DEFAULT_INSTANCE.toBuilder();
  }
<pre>
URI source for an IFrame to display for the ad resource.
</pre>

<code>string uri = 1;</code>

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