code: public void setOverlayUrl(final String overlayUrl) {
  		String currOverlayUrl = getOverlayUrl();
  
  		if (!Objects.equals(overlayUrl, currOverlayUrl)) {
  			ImageEditModel model = getOrCreateComponentModel();
  			model.overlayUrl = overlayUrl;
  		}
  	}
docs: Sets the overlay image URL.
  An overlay image is rendered on top of the image being edited (but does not form part of the saved image).
  
  @param overlayUrl the overlay image URL.