private com.google.protobuf.MapField<java.lang.String, java.lang.String>
      internalGetAdTagMacros() {
    if (adTagMacros_ == null) {
      return com.google.protobuf.MapField.emptyMapField(AdTagMacrosDefaultEntryHolder.defaultEntry);
    }
    return adTagMacros_;
  }
<pre>
Output only. The URI to play the live session's ad-stitched stream.
</pre>

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

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