private static void OnEditorUpdate()
        {
            if (EditorApplication.isCompiling)
            {
                if (HasOngoingDefineSymbols)
                {
                    ShowNotification("AGX Dynamics for Unity is being installed...", 1.0);
                }
                return;
            }

            if (DefineSymbols.Contains(OnImportDefineSymbol))
            {
                DefineSymbols.Remove(OnImportDefineSymbol);
            }
            else
            {
                EditorApplication.update -= OnEditorUpdate;
            }
        }