}

    public void test_isTarget_withNullDocMap() {
        // Test with null document map
        assertFalse(thumbnailGenerator.isTarget(null));
    }

    public void test_isTarget_withEmptyDocMap() {
        // Test with empty document map
        Map<String, Object> docMap = new HashMap<>();
        assertFalse(thumbnailGenerator.isTarget(docMap));
    }