@Override
      public void projectClosed(@NotNull Project project) {
        LOG.debug("closed project: %s", project);

        final JFrame frame = WindowManager.getInstance().getFrame(project);
        if (frame == null) {
          // can be when frame is closing (and project is disposing)
          LOG.debug("null frame for project: %s", project);
          return;
        }

        TouchBarsManager.unregister(frame); // remove project-default action group
      }
@Override
      public void projectClosed(@NotNull Project project)