@interface MPUSpringAnimationFactory : MPUAnimationFactory @property (nonatomic) double damping; @property (nonatomic) double mass; @property (nonatomic) double stiffness; @property (nonatomic) double velocity; + (void)animateUsingSpringWithDamping:(double)a0 mass:(double)a1 stiffness:(double)a2 velocity:(double)a3 animations:(id /* block */)a4 options:(unsigned long long)a5 completion:(id /* block */)a6; - (id)_basicAnimationForView:(id)a0 withKeyPath:(id)a1; - (double)durationForEpsilon:(double)a0; - (id)_newSpringAnimationForKeyPath:(id)a0; @end