try (ServletOutputStream out = response.getOutputStream(); InputStream in = curlResponse.getContentAsStream()) {
                response.setStatus(curlResponse.getHttpStatusCode());
                writeHeaders(response);
                final String responseContentType = curlResponse.getHeaderValue("Content-Type");
                if (StringUtil.isBlank(responseContentType)) {

            if (!used.contains(vq)) {
                groupedQueries.add(vq);
            }
        }
        return groupedQueries.toArray(new String[0]);
    }

    @Override
    protected void writeHeaders(final HttpServletResponse response) {
        ComponentUtil.getFessConfig().getApiJsonResponseHeaderList().forEach(e -> response.setHeader(e.getFirst(), e.getSecond()));
    }

       *
       * http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-12#section-6.2.3
       */
      @Throws(IOException::class)
      fun writeHeaders(headerBlock: List<Header>) {
        if (emitDynamicTableSizeUpdate) {
          if (smallestHeaderTableSizeSetting < maxDynamicTableByteCount) {
            // Multiple dynamic table size updates!

        }

        @Override
        public HighlightInfo getHighlightInfo() {
            return new HighlightInfo();
        }
    }

    @Override
    protected void writeHeaders(final HttpServletResponse response) {
        ComponentUtil.getFessConfig().getApiJsonResponseHeaderList().forEach(e -> response.setHeader(e.getFirst(), e.getSecond()));
    }

    /**

    }

    private void reportErrors(Map<File, List<Error>> errors, File reportFile) {
        try (PrintWriter fw = new PrintWriter(new FileWriter(reportFile))) {
            writeHeader(fw);
            if (errors.isEmpty()) {
                fw.println("All clear!");
                return;
            }
            for (Map.Entry<File, List<Error>> e : errors.entrySet()) {