+ selector:@selector(mappingDidChange:)
+ name:NJEventMappingChanged
+ object:nil];
+ [NSNotificationCenter.defaultCenter
+ addObserver:self
+ selector:@selector(eventTranslationActivated:)
+ name:NJEventTranslationActivated
+ object:nil];
+ [NSNotificationCenter.defaultCenter
+ addObserver:self
+ selector:@selector(eventTranslationDeactivated:)
+ name:NJEventTranslationDeactivated