code: public static String createNameForHiddenEventHandlerMethod(String eventId, int handlerIndex) {
  		return PREFIX_EVENT_HANDLER + fixHiddenMember(eventId) + HIDDEN_MEMBER_CHARACTER + handlerIndex;
  	}
docs: Create the name of the hidden method that is containing the event handler code.
  
  @param eventId the id of the event.
  @param handlerIndex the index of the handler in the container type.
  @return the attribute name.