code: def remove_child_catalogs(self, catalog_id):
          
          # Implemented from template for
          # osid.resource.BinHierarchyDesignSession.remove_child_bin_template
          if self._catalog_session is not None:
              return self._catalog_session.remove_child_catalogs(catalog_id=catalog_id)
          return self._hierarchy_session.remove_children(id_=catalog_id)
docs: Removes all children from a catalog.
  
          arg:    catalog_id (osid.id.Id): the ``Id`` of a catalog
          raise:  NotFound - ``catalog_id`` is not in hierarchy
          raise:  NullArgument - ``catalog_id`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure occurred
          *compliance: mandatory -- This method must be implemented.*