+ // Returns true if given key combination should toggle the popup.
+ // NB: This is a separate from other keyboard handling because:
+ // 1) Replaceability.
+ // 2) Centralized code (otherwise it'd be split up between
+ // wxComboCtrl key handler and wxVListBoxComboPopup's
+ // key handler).
+ virtual bool IsKeyPopupToggle(const wxKeyEvent& event) const = 0;
+