@abc.abstractmethod<EOL><INDENT>def search_among_catalogs(self, catalog_ids):<DEDENT>
pass<EOL>
Execute this search among the given list of catalogs.

        :param catalog_ids: list of catalogs
        :type catalog_ids: ``osid.id.IdList``
        :raise: ``NullArgument`` -- ``catalog_ids`` is ``null``

        *compliance: mandatory -- This method must be implemented.*