public override void AwakeFromNib()
        {
            base.AwakeFromNib();

            SplitView.IsVertical   = true;
            SplitView.DividerStyle = NSSplitViewDividerStyle.Thin;
            SplitView.SetValueForKey(NSColor.FromWhite((nfloat)0.15, (nfloat)0.9), KeyPath.NSSplitView.DividerColor.NSString());
        }