@protocol UIVectorOperatable; @interface UIViewUpdateVelocityAnimationDescription : NSObject @property (retain, nonatomic) id<UIVectorOperatable> velocity; @property (retain, nonatomic) id<UIVectorOperatable> targetVelocity; + (id)descriptionWithVelocity:(id)a0 targetVelocity:(id)a1; - (id)initWithVelocity:(id)a0 targetVelocity:(id)a1; - (void).cxx_destruct; @end