 private let defaultAlphaValueTransparent: CGFloat = 0.0
 private let defaultAlphaValueSemiTransparent: CGFloat = 0.7
 
-private let revertCardAnimationName = "revertCardAlphaAnimation"
-private let revertCardAnimationDuration: NSTimeInterval = 1.0
-private let revertCardAnimationToValue: CGFloat = 1.0
-private let revertCardAnimationFromValue: CGFloat = 0.0
 public protocol KolodaViewDataSource:class {
     
     func koloda(kolodaNumberOfCards koloda: KolodaView) -> UInt

                
                firstCardView.frame = frameForTopCard()
                
                applyRevertAnimation(firstCardView, complete: {
                    self.delegate?.koloda(self, didShowCardAtIndex: UInt(self.currentCardNumber))
                })
            }
            

            self?.userInteractionEnabled = true
            self?.animating = false
        }
    }
    
    //MARK: DraggableCardDelegate
