void OnTextViewClosed(object sender, EventArgs e)
 {
     _logger.PublicEntry(() => {
         UnsubscribeFromAllEvents();
     }, "OnTextViewClosed");
 }
 void OnVisibilityChanged(object sender, DependencyPropertyChangedEventArgs e)
 {
     _logger.PublicEntry(() => {
         ShouldRefreshLineTransformer = true;
     }, "OnVisibilityChanged");
 }