code: def get_urls(self):
          
          urls = []
  
          for action in self.get_extra_actions():
              regex = r'^{}/$'.format(self._get_action_href(action))
              view = self.admin_site.admin_view(action)
              urls.append(url(regex, view))
  
          return urls + super(ExtraActionsMixin, self).get_urls()
docs: Inject extra action URLs.