* @modmask: the key modifier mask for which this listener is to be
* 'deregistered' (of type #AccessibleeyMaskType).
*
+ * Removes a keystroke event listener from the registry's listener queue,
+ * ceasing notification of events with modifiers matching @modmask.
**/
void
deregisterAccessibleKeystrokeListener (AccessibleKeystrokeListener *listener,