docs: def _urls(self):
          """
          URL patterns for tool linked to _view method.
          """
          info = (
              self.model._meta.app_label, self.model._meta.model_name,
              self.name,
          )
          urlpatterns = [
              url(r'^%s/$' % self.name, self._view, name='%s_%s_%s' % info)
          ]
          return urlpatterns