ResteasyClientProxy class should be deprecated

    @Test
    public void testOldClient() throws Exception {
        InterfaceA a = ProxyFactory.create(InterfaceA.class, generateURL("/foobar"));
        assertEquals("FOO", a.getFoo());
        InterfaceB b = ((ResteasyClientProxy) a).as(InterfaceB.class);
        assertEquals("BAR", b.getBar());
    }

    @Test
    public void testNewClient() throws Exception {
        InterfaceA a = client.target(generateURL("/foobar")).proxy(InterfaceA.class);
        assertEquals("FOO", a.getFoo());
        InterfaceB b = ((ResteasyClientProxy) a).as(InterfaceB.class);
        assertEquals("BAR", b.getBar());
    }