@Override
                public void onError(Exception e) {
                    throw new IllegalStateException("ARImageMarker - unable to fetch target", e);
                }
This function fetches the target and either creates a new ARDeclarativeImageNode or
updates it with the new target.

@param shouldAddToScene whether or not this should add or update an existing
                        ARDeclarativeImageNode
android/viro_bridge/src/main/java/com/viromedia/bridge/component/node/VRTARImageMarker.java