Method XbpTreeViewItem():isExpanded() Foundation
Determines whether or not sub-items are visible.
:isExpanded() --> lIsExpanded
This method returns .T. (true) when sub-items of an XbpTreeViewItem object are visible, otherwise it returns .F. (false).
The method :isExpanded() is used to check the visibility of sub-levels in a tree view. Whether or not an XbpTreeViewItem objects has sub-items can be tested with the expression .NOT. Empty( oItem:getChildItems() ).
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