* @param contents
     *            The content. Must not be {@literal null}.
     * @return {@link InputStream}
     */
    public static InputStream getContentsAsStream(final String contents) {
        assertArgumentNotNull("contents", contents);
        return getContentsAsStream(contents, null);
    }

    /**
     * Retrieves the XML content as an {@link InputStream} with the specified encoding.
     *
     * @param contents