code: protected void addPrependingAddOnToInputGroup(FacesContext context, ResponseWriter rw,
  			UIComponent prependingAddOnFacet, boolean hasPrependingAddOn, SelectOneMenu menu) throws IOException {
  		if (hasPrependingAddOn) {
  			R.decorateFacetComponent(menu, prependingAddOnFacet, context, rw);
  		}
  	}
docs: Renders components added seamlessly in front of the input field.
  
  @param context
  the FacesContext
  @param rw
  the response writer
  @param prependingAddOnFacet
  @param hasPrependingAddOn
  @throws IOException
  may be thrown by the response writer