public void Unfocus(IContainerNode containerBaseNode)
        {
            // Show all inside and neighbors of parent
            containerBaseNode.GetParent().SetHiddenRecursive(false);
            var parentContainerBaseNode = containerBaseNode.GetParent() as IContainerNode;

            if (parentContainerBaseNode != null)
            {
                foreach (var neighborNode in parentContainerBaseNode.GetLinkedNodes <IBaseNode>(true))
                {
                    neighborNode.Hidden = false;
                }
            }

            //show all children of ancestors with IsExpandedByDefault
            while (parentContainerBaseNode != null && parentContainerBaseNode.IsExpandedByDefault)
            {
                parentContainerBaseNode.SetHiddenRecursive(false);
                parentContainerBaseNode = parentContainerBaseNode.GetParent() as IContainerNode;
            }

            // Collapse node and arrange its neighborhood nodes
            containerBaseNode.Collapse(100);

            containerBaseNode.PostLayoutStep();
            _view.Refresh();
        }