assertEquals(3, data.getValues("key").length);
        assertEquals("value3", data.getValues("key")[0]);
        assertEquals("value5", data.getValues("key")[2]);
    }

    public void test_serializable() {
        // Test that ExtractData is Serializable
        ExtractData data = new ExtractData("content");
        assertTrue(data instanceof java.io.Serializable);
    }