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
-associated with it and number of leaves may be quite big.
+associated with it and the number of leaves may be quite big.
Also please note that because the objects of this class are deleted by the tree
using the operator {\tt delete}, they must always be allocated on the heap
\membersection{wxTreeItemData::GetId}\label{wxtreeitemdatagetid}
-\func{const wxTreeItem\&}{GetId}{\void}
+\func{const wxTreeItemId\&}{GetId}{\void}
Returns the item associated with this node.