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

}

@objc(NavigationDrawerController)
open class NavigationDrawerController: TransitionController {
  /// A boolean indicating if the panel is animating.
  fileprivate var isAnimating = false

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