code: def get_repositories_by_genus_type(self, repository_genus_type):
          
          # Implemented from template for
          # osid.resource.BinLookupSession.get_bins_by_genus_type_template
          # NOTE: This implementation currently ignores plenary view
          if self._catalog_session is not None:
              return self._catalog_session.get_catalogs_by_genus_type(catalog_genus_type=repository_genus_type)
          collection = JSONClientValidated('repository',
                                           collection='Repository',
                                           runtime=self._runtime)
          result = collection.find({"genusTypeId": str(repository_genus_type)}).sort('_id', DESCENDING)
  
          return objects.RepositoryList(result, runtime=self._runtime, proxy=self._proxy)
docs: Gets a ``RepositoryList`` corresponding to the given repository genus ``Type`` which does not include repositories of types derived from the specified ``Type``.
  
          In plenary mode, the returned list contains all known
          repositories or an error results. Otherwise, the returned list
          may contain only those repositories that are accessible through
          this session.
  
          arg:    repository_genus_type (osid.type.Type): a repository
                  genus type
          return: (osid.repository.RepositoryList) - the returned
                  ``Repository list``
          raise:  NullArgument - ``repository_genus_type`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          *compliance: mandatory -- This method must be implemented.*