// Test getting non-existing item
        OptionalEntity<ProtwordsItem> item = protwordsFile.get(999);
        assertFalse(item.isPresent());
    }

    @Test
    public void test_get_withUnloadedData() {
        // Test getting item when data is not loaded yet
        OptionalEntity<ProtwordsItem> item = protwordsFile.get(1);
        assertTrue(item.isPresent());