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

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