@abc.abstractmethod<EOL><INDENT>def search_among_values(self, value_ids):<DEDENT>
pass<EOL>
Executes this search among a given list of values.

        :param value_ids: list of values
        :type value_ids: ``osid.id.IdList``
        :raise: ``NullArgument`` -- ``value_ids`` is ``null``

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