private void SetupLeadingSplitViewItem()
{
NSSplitViewItem splitViewItem = NSSplitViewItem.CreateContentList(LeadingContentListViewController);
splitViewItem.CanCollapse = true;
splitViewItem.MaximumThickness = 400;
AddSplitViewItem(splitViewItem);
Disposables.Add(splitViewItem.AddObserver(KeyPath.NSSplitViewItem.Collapsed.String(), New, change => {
NSDictionary userInfo = new NSDictionary
(
ToggleCollapsed.UserInfoKey.IsCollapsed.String(), change.NewValue,
ToggleCollapsed.UserInfoKey.SegmentIndex.String(), 0
);
NotificationCenter.PostNotificationName(ToggleCollapsed.Name, null, userInfo);
}));
}
