xt/html"].includes("//Marker {{prefix}}")
                }
                return false;
            }).length > 0;
        });
        if(cells.length>0){
            var cell=cells[0];
            var cellId=cell.cell_id;
            var cellMetadata=cell._metadata.pixiedust;
            var old_msg_id = cell.last_msg_id;
            if (old_msg_id) {
                cell.kernel.clear_callbacks_for_msg(old_msg_id);
            }
            function getCellWidth(){
                try{
                  