pub unsafe extern "C" fn AXObserverAddNotification(
observer: AXObserverRef,
element: AXUIElementRef,
notification: CFStringRef,
refcon: *mut c_void,
) -> AXErrorpub unsafe extern "C" fn AXObserverAddNotification(
observer: AXObserverRef,
element: AXUIElementRef,
notification: CFStringRef,
refcon: *mut c_void,
) -> AXError