   handler: () => {
            // if menu closed
            ninja.open({ parent: 'Theme'});
            // if menu opened that prevent it from closing on select such actions
            return {keepOpen: true};
          },
        },
        {
          id: 'Light Theme',
          title: 'Change theme to Light',
          mdIcon: 'light_mode',
          parent: 'Theme',
          handler: () => {
            // simple handler
            document.documentElement.classList.remove('dark');
            nin