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

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