code: function findClosestGroup(oRef) {
  			var oGroup = findClosestCustomGroup(oRef);
  			if (oGroup) {
  				return oGroup;
  			}
  
  			var $Group = jQuery(oRef).closest('[data-' + F6Navigation.fastNavigationKey + '="true"]');
  			return $Group[0];
  		}
docs: Returns the nearest parent DomRef of the given DomRef with attribute data-sap-ui-fastnavgroup="true" or (if available) the nearest parent with attribute data-sap-ui-customfastnavgroup="true".