code: protected void addAppendingAddOnToInputGroup(FacesContext context, ResponseWriter rw,
  			UIComponent appendingAddOnFacet, boolean hasAppendingAddOn, SelectOneMenu menu) throws IOException {
  		if (hasAppendingAddOn) {
  			R.decorateFacetComponent(menu, appendingAddOnFacet, context, rw);
  		}
  	}
docs: Renders components added seamlessly behind the input field.
  
  @param context
  the FacesContext
  @param rw
  the response writer
  @param appendingAddOnFacet
  optional facet behind the field. Can be null.
  @param hasAppendingAddOn
  optional facet in front of the field. Can be null.
  @throws IOException
  may be thrown by the response writer