         static var sharingCompleted = "UIViewController.sharingCompleted"
     }
 
+    /// A property for configuring the tintColor on MFMailComposeViewController or MFMessageComposeViewController.
     public var sharingBarButtonItemTintColor: UIColor? {
         get {
             return objc_getAssociatedObject(self, &AssociatedObjectKeys.sharingBarButtonItemTintColor) as? UIColor


}


// MARK: Boxing so we can store the sharingCompleted closure on UIViewController

private class SharingCompletedEventBox {

    var event: SharingCompletedEvent?

        }
    }

    /// Share to a social network.
    /// This includes SocialNetwork.twitter, .facebook, .sinaWeibo, and .tencentWeibo.
    ///
    /// - parameter parameters: Parameters that are applicable for sharing to a social network.
    func share(socialParameters parameters: SocialShareParameters) {
        self.shareIfPossible(destination: ShareDestination.activityController) {
            let destination = parameters.network.shareDestination
