docs: public static List<String> getElements(File file, String charset) {
  
      List<String> list = new ArrayList<>();
      try (BufferedReader br = new BufferedReader(
        new InputStreamReader(java.nio.file.Files.newInputStream(file.toPath()), charset))) {
        StringBuilder sb = new StringBuilder(4096);
        String line;
        int cnt = 0;
        final Pattern whitespacesOnly = Pattern.compile("^\\s*$");
  
        while ((line = br.readLine()) != null) {
          if (cnt > (TOP_COUNT)) {
            if (whitespacesOnly.matcher(line).matches()) {
              list.add(sb.toString());
              sb.setLength(0);
            } else {
              sb.append(line);
              sb.append('\n');
            }
          }
          ++cnt;
        }
  
        if (sb.length() > 0) {
          list.add(sb.toString());
        }
      } catch (IOException e) {
        String msg = new StringBuilder(512).append("Cannot feed the data into sonar, details: '")
          .append(e)
          .append("'").toString();
        LOG.error(msg);
      }
      return list;
    }