*/
    public long getSize() {
        return size;
    }

    /**
     * Returns the last modified timestamp.
     *
     * @return the last modified timestamp
     */
    public ZonedDateTime getLastModified() {
        return lastModified;
    }

    /**
     * Returns the base64-encoded ID of the item.
     *
     * @return the encoded ID
     */
    public String getEncodedId() {

    public void test_responseData_lastModified() {
        final ResponseData responseData = new ResponseData();

        assertNull(responseData.getLastModified());
        final Date now = new Date();
        responseData.setLastModified(now);
        assertEquals(now, responseData.getLastModified());
    }

    @Test
    public void test_metaContentMapping() {
        transformer.metaContentMapping = new HashMap<>();