$('#dg').datagrid('getPanel').find('.easyui-tooltip')
.each(function(idx,elm){
let tip = $(elm).tooltip('tip');
$(elm).tooltip('destroy');
// console.log(idx, tip);
if(tip != undefined){$(tip).remove();}
});
if elm is not initialized this
let tip = $(elm).tooltip('tip');
trow error.
How check initialization of tooltip?