         self.textField.inputView = UIView(frame: CGRectZero)
     }
     
-    // MARK: responder
+    // MARK: Responder handling
     
     override public func becomeFirstResponder() -> Bool {
         self.textField.userInteractionEnabled = true

    override public func intrinsicContentSize() -> CGSize {
        return CGSizeMake(self.bounds.size.width, 50.0)
    }
}



    // MARK: Animation timing
    
    /// The value of the title appearing duration.
    public var titleFadeInDuration:Double = 0.2
    /// The value of the title disappearing duration.
    public var titleFadeOutDuration:Double = 0.6
    
    // MARK: Colors
