will be automatically freed when it is deleted. Note that we don't use wxObject
as the base class for wxTreeItemData because the size of this class is
critical: in many applications, each tree leaf will have wxTreeItemData
will be automatically freed when it is deleted. Note that we don't use wxObject
as the base class for wxTreeItemData because the size of this class is
critical: in many applications, each tree leaf will have wxTreeItemData