UnityEditor.DockArea.RemoveNullWindows C# (CSharp) Method

        private void RemoveNullWindows()
        {
            List<EditorWindow> list = new List<EditorWindow>();
            foreach (EditorWindow window in this.m_Panes)
            {
                if (window != null)
                {
                    list.Add(window);
                }
            }
            this.m_Panes = list;
        }