code: public static boolean beginDisabledFieldset(IContentDisabled component, ResponseWriter rw) throws IOException {
  		if (component.isContentDisabled()) {
  			rw.startElement("fieldset", (UIComponent) component);
  			rw.writeAttribute("disabled", "disabled", "null");
  			return true;
  		}
  		return false;
  	}
docs: Renders the code disabling every input field and every button within a
  container.
  
  @param component
  @param rw
  @return true if an element has been rendered
  @throws IOException