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Some of UIResponder
@interface UIResponder
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender;
- (id)targetForAction:(SEL)action withSender:(id)sender NS_AVAILABLE_IOS(7_0);
@end
@interface UIApplication
- (BOOL)sendAction:(SEL)action to:(id)target from:(id)sender forEvent:(UIEvent *)event;
@end
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