protected bool TryCloseTab(int index)
        {
            if (index >= 0 || index < Tabs.Count)
            {
                // Close the specified content.
                IDockContent content = Tabs[index].Content;
                DockPane.CloseContent(content);
                if (PatchController.EnableSelectClosestOnClose == true)
                {
                    SelectClosestPane(index);
                }

                return(true);
            }
            return(false);
        }