public static void CommandHandler(object target, ExecutedRoutedEventArgs ea)
        {
            ea.Handled = true;
            var mainWindow = (MainWindow)Application.Current.MainWindow;
            var tweet      = ea.Parameter as Tweet ?? mainWindow.Timeline.GetSelectedTweet;

            if (tweet == null)
            {
                return;
            }
            TimelineController.CopyLinkToClipboard(tweet);
        }