@class CADisplayLink; @interface _UIActiveTimer : NSObject { CADisplayLink *_displayLink; id /* block */ _updateHandler; } @property (readonly, nonatomic, getter=isComplete) BOOL complete; - (void)_tick:(id)a0; - (void)invalidate; - (void).cxx_destruct; - (id)initWithDuration:(double)a0 updateHandler:(id /* block */)a1; @end