local interface ServantLocator : ServantManager {

    native Cookie;

    Servant preinvoke (in ObjectId oid,
                       in POA adapter,
                       in CORBA::Identifier operation,
                       out Cookie cookie)
    raises (ForwardRequest);

    void postinvoke (in ObjectId oid,
                     in POA adapter,
                     in CORBA::Identifier operation,
                     in Cookie cookie,
                     in Servant servant);
};