 //
 
 import UIKit
+
+public let defaultTransitionDuration: NSTimeInterval = 0.5
 
 public protocol MCMHeaderAnimatedDelegate {
     

            } else {
                transitionContext.completeTransition(true)
            }
        })
        
    }
    

                toView.alpha = 1.0
                headerIntermediate.frame = self.headerFromFrame
            }
        }) { finished in
            headerIntermediate.removeFromSuperview()
            headerTo.alpha = 1
            headerFrom.alpha = 1
