UnityEditor.GameObjectTreeViewDataSource.RebuildVisibilityTree C# (CSharp) Method

        private void RebuildVisibilityTree(TreeViewItem item, List<TreeViewItem> visibleItems)
        {
            if ((item != null) && item.hasChildren)
            {
                for (int i = 0; i < item.children.Count; i++)
                {
                    if (item.children[i] != null)
                    {
                        visibleItems.Add(item.children[i]);
                        this.RebuildVisibilityTree(item.children[i], visibleItems);
                    }
                }
            }
        }