code: def get_urls(self):
          
          not_clone_url = [url(r'^(.+)/will_not_clone/$',
                               admin.site.admin_view(self.will_not_clone))]
          restore_url = [
              url(r'^(.+)/restore/$', admin.site.admin_view(self.restore))]
          return not_clone_url + restore_url + super(VersionedAdmin,
                                                     self).get_urls()
docs: Appends the custom will_not_clone url to the admin site