    velocity of the user interaction when animating the
    leftView. Defaults to 0.
    */
+  @objc
   open func toggleLeftView(velocity: CGFloat = 0) {
     isLeftViewOpened ? closeLeftView(velocity: velocity) : openLeftView(velocity: velocity)
   }

   velocity of the user interaction when animating the
   leftView. Defaults to 0.
   */
  open func closeLeftView(velocity: CGFloat = 0) {
    guard !isAnimating else {
      return

   velocity of the user interaction when animating the
   leftView. Defaults to 0.
   */
  @objc
  open func openRightView(velocity: CGFloat = 0) {
    guard !isAnimating else {
      return
