static void PlaceToastNotificationsView(NSView toastNotificationsView, NSView parent)
 {
     parent.AddSubview(toastNotificationsView);
     toastNotificationsView.TranslatesAutoresizingMaskIntoConstraints = false;
     parent.AddConstraint(NSLayoutConstraint.Create(
                              toastNotificationsView, NSLayoutAttribute.Trailing, NSLayoutRelation.Equal,
                              parent, NSLayoutAttribute.Trailing, 1f, 2f));
     parent.AddConstraint(NSLayoutConstraint.Create(
                              toastNotificationsView, NSLayoutAttribute.Top, NSLayoutRelation.Equal,
                              parent, NSLayoutAttribute.Top, 1f, 2f));
 }
 public static void DoMergedConstraints(this NSView view, params object[] constraints)
 {
     foreach (var o in constraints)
     {
         var singleConstraint   = o as NSLayoutConstraint;
         var multipleConstraint = o as NSLayoutConstraint[];
         if (singleConstraint != null)
         {
             view.AddConstraint(singleConstraint);
         }
         else if (multipleConstraint != null)
         {
             view.AddConstraints(multipleConstraint);
         }
         else
         {
             throw new ArgumentException("Unexpected constraint type: " + o.GetType());
         }
     }
 }