code: public static void fire(final HasSummernoteEnterHandlers source) {
          if (TYPE != null) {
              SummernoteEnterEvent event = new SummernoteEnterEvent();
              source.fireEvent(event);
          }
      }
docs: Fires a summernote enter event on all registered handlers in the handler
  manager. If no such handlers exist, this method will do nothing.
  
  @param source the source of the handlers