secondLine.put("kinds", Arrays.toString(item.getKinds()));
        secondLine.put("@timestamp", item.getTimestamp());

        try (OutputStream out1 = getXContentOutputStream(firstLineMap); OutputStream out2 = getXContentOutputStream(secondLine)) {
            return ((ByteArrayOutputStream) out1).toString(CoreLibConstants.UTF_8) + '\n'
                    + ((ByteArrayOutputStream) out2).toString(CoreLibConstants.UTF_8);

     *
     * @param xContent the content object to convert
     * @param mediaType the media type for the output
     * @return an OutputStream containing the converted content
     */
    public static OutputStream getXContentOutputStream(final ToXContent xContent, final MediaType mediaType) {
        return getXContentBuilderOutputStream((builder, params) -> xContent.toXContent(builder, params), mediaType);
    }

    /**