pub unsafe extern "C" fn CFRunLoopObserverCreateWithHandler(
allocator: CFAllocatorRef,
activities: CFOptionFlags,
repeats: Boolean,
order: CFIndex,
block: *mut c_void,
) -> CFRunLoopObserverRefpub unsafe extern "C" fn CFRunLoopObserverCreateWithHandler(
allocator: CFAllocatorRef,
activities: CFOptionFlags,
repeats: Boolean,
order: CFIndex,
block: *mut c_void,
) -> CFRunLoopObserverRef