+ // return the type of client data stored in this control: usually it just
+ // returns m_clientDataItemsType but must be overridden in the controls
+ // which delegate their client data storage to another one (e.g. wxChoice
+ // in wxUniv which stores data in wxListBox which it uses anyhow); don't
+ // forget to override SetClientDataType() if you override this one
+ //
+ // NB: for this to work no code should ever access m_clientDataItemsType
+ // directly but only via this function!
+ virtual wxClientDataType GetClientDataType() const
+ { return m_clientDataItemsType; }
+