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

        :param authorization_ids: list of authorizations
        :type authorization_ids: ``osid.id.IdList``
        :raise: ``NullArgument`` -- ``authorization_ids`` is ``null``

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