// Test toLineString when newInput is set back to null
        ProtwordsItem item = new ProtwordsItem(1, "originalword");
        item.setNewInput("tempword");
        assertEquals("tempword", item.toLineString());

        item.setNewInput(null);
        assertEquals("originalword", item.toLineString());
    }

    public void test_getId() {
        // Test getId method inherited from DictionaryItem