MapEditor.RegisterUndo C# (CSharp) Method

    void RegisterUndo(string label)
    {
        //close, but no cigar:
        /*Map m = ((Map)target);
        Undo.RegisterUndo(EditorUtility.CollectDeepHierarchy(new Object[]{
            m.gameObject,
            m.gameObject.GetComponent<MeshFilter>(),
            m.gameObject.GetComponent<MeshFilter>().sharedMesh}
        ), label);*/
        Undo.RegisterSceneUndo(label);
    }