docs: def list(self, request):
          """Search the doctypes for this model."""
          query = get_query_params(request).get("search", "")
          results = []
          base = self.model.get_base_class()
          doctypes = indexable_registry.families[base]
          for doctype, klass in doctypes.items():
              name = klass._meta.verbose_name.title()
              if query.lower() in name.lower():
                  results.append(dict(
                      name=name,
                      doctype=doctype
                  ))
                  results.sort(key=lambda x: x["name"])
          return Response(dict(results=results))