code: def remove_child_vaults(self, vault_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=vault_id)
          return self._hierarchy_session.remove_children(id_=vault_id)
docs: Removes all children from a vault.
  
          arg:    vault_id (osid.id.Id): the ``Id`` of a vault
          raise:  NotFound - ``vault_id`` is not in hierarchy
          raise:  NullArgument - ``vault_id`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          *compliance: mandatory -- This method must be implemented.*