property is designed to allow checking/unchecking all child items and to indicate the selected state of those child items and it will not be possible to achieve the desired behavior with checkChildren set to "true". However, you could try to set it to "false" and use the "check
" event to manually check/uncheck all child items. This will allow you to keep the checked state of the parent items when you click on a child item.
Hope this helps.
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