performAction(action: GridToolbarAction) {
     const rows = this.gridContext.getSelectedRows();
     action.onClick.emit(rows);
     if (action.action) { action.action(rows); }
 }
 shouldDisableAction(action: GridToolbarAction) {
     if (action.disableOnRows) {
         return action.disableOnRows(this.gridContext.getSelectedRows());
     }
     return false;
 }
 performAction(action: GridToolbarAction) {
     action.action(this.gridContext.getSelectedRows());
 }