docs: private static void emitSingleCell(
        PrintWriter out,
        Formatter formatter,
        String spanName,
        int numSamples,
        RequestType type,
        int subtype)
        throws UnsupportedEncodingException {
      if (numSamples > 0) {
        formatter.format(
            "<td class=\"center\"><a href='?%s=%s&%s=%d&%s=%d'>%d</a></td>%n",
            HEADER_SPAN_NAME,
            URLEncoder.encode(spanName, "UTF-8"),
            HEADER_SAMPLES_TYPE,
            type.getValue(),
            HEADER_SAMPLES_SUB_TYPE,
            subtype,
            numSamples);
      } else if (numSamples < 0) {
        out.write("<td class=\"center\">N/A</td>\n");
      } else {
        out.write("<td class=\"center\">0</td>\n");
      }
    }