Collection addr = (Collection) m_pm.newQuery (Extensions.OQL, "$1.address").execute(luke);
Collection addr = query("$1.address", luke);
    public void testIdentity() {        Employee e = makeLuke();        Address a = e.getAddress();        Collection luke = lukes();        assertSingleton(e, luke);        assertEquals(a, e.getAddress());        assertEquals(L_STREET, a.getStreet());        assertEquals(L_CITY, a.getCity());        assertEquals(L_STATE, a.getState());        assertEquals(L_ZIP, a.getZip());        Collection addr = (Collection) m_pm.newQuery            (Extensions.OQL, "$1.address").execute(luke);        assertSingleton(a, addr);    }