/**
Sets the item associated with this node.
+
+ Notice that this function is automatically called by wxTreeCtrl methods
+ associating an object of this class with a tree control item such as
+ wxTreeCtrl::AppendItem(), wxTreeCtrl::InsertItem() and
+ wxTreeCtrl::SetItemData() so there is usually no need to call it
+ yourself.
*/
void SetId(const wxTreeItemId& id);
};