StringBuilder contentBuilder = new StringBuilder();
                while ((line = reader.readLine()) != null) {
                    if (!line.trim().startsWith("#")) {
                        existingClasses.add(line.trim());
                    }
                    contentBuilder.append(line).append("\n");
                }
                existingContent = contentBuilder.toString();
            }

         *
         * @param builder the XContentBuilder to use for building content
         * @param params the parameters to use during content building
         * @return the modified XContentBuilder
         * @throws IOException if an IO error occurs during building
         */
        XContentBuilder apply(XContentBuilder builder, ToXContent.Params params) throws IOException;
    }

        if (logger.isDebugEnabled()) {
            logger.debug("Set suggest settings. {} {}", settingsIndexName, map.toString());
        }
        try {
            final XContentBuilder builder = JsonXContent.contentBuilder().map(map);
            builder.flush();
            client.prepareUpdate()
                    .setIndex(settingsIndexName)
                    .setId(settingsId)

        final String actualIndex = index + "." + type.toLowerCase(Locale.ENGLISH);
        try {
            final XContentBuilder builder = JsonXContent.contentBuilder().map(source);
            builder.flush();
            client.prepareUpdate()
                    .setIndex(actualIndex)
                    .setId(id)
                    .setDocAsUpsert(true)

            throw new SuggesterException(e);
        }
    }

    private static OutputStream getXContentOutputStream(final Map<String, Object> firstLineMap) throws IOException {
        try (XContentBuilder builder = JsonXContent.contentBuilder().map(firstLineMap)) {
            builder.flush();
            return builder.getOutputStream();
        }
    }

    /**

        assertNotNull(yamlOutput);
    }

    public void test_getXContentOutputStream_success() {
        ToXContent xContent = new ToXContent() {
            @Override
            public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
                builder.startObject();
                builder.field("content", "test");
                builder.endObject();
                return builder;

     *
     * @param builder The XContentBuilder to write to.
     * @param params Additional parameters for the conversion.
     * @return The XContentBuilder with the access result data.
     * @throws IOException if the conversion fails.
     */
    @Override
    public XContentBuilder toXContent(final XContentBuilder builder, final Params params) throws IOException {
        builder.startObject();

     *
     * @param builder The XContentBuilder to write to.
     * @param params Additional parameters for the conversion.
     * @return The XContentBuilder with the URL queue data.
     * @throws IOException if the conversion fails.
     */
    @Override
    public XContentBuilder toXContent(final XContentBuilder builder, final Params params) throws IOException {
        builder.startObject();

     *
     * @param builder The XContentBuilder to write to.
     * @param params Additional parameters for the conversion.
     * @return The XContentBuilder with the URL filter data.
     * @throws IOException if the conversion fails.
     */
    @Override
    public XContentBuilder toXContent(final XContentBuilder builder, final Params params) throws IOException {
        builder.startObject();

     *
     * @param builder The XContentBuilder to write to.
     * @param params Additional parameters for the conversion.
     * @return The XContentBuilder with the access result data.
     * @throws IOException if the conversion fails.
     */
    @Override
    public XContentBuilder toXContent(final XContentBuilder builder, final Params params) throws IOException {
        builder.startObject();