@utilities.arguments_not_none<EOL><INDENT>def search_among_vaults(self, vault_ids):<DEDENT>
self._id_list = vault_ids<EOL>
Execute this search among the given list of vaults.

        arg:    vault_ids (osid.id.IdList): list of vaults
        raise:  NullArgument - ``vault_ids`` is ``null``
        *compliance: mandatory -- This method must be implemented.*