@Override
  public List<String> getCLIOptions() {
    final List<String> options = new ArrayList<>();
    options.add(ETHSTATS + "=" + ethstatsUrl);
    options.add(ETHSTATS_CONTACT + "=" + ethstatsContact);
    if (ethstatsCaCert != null) {
      options.add(ETHSTATS_CACERT_FILE + "=" + ethstatsCaCert);
    }
    return options;
  }
Returns path to root CA cert file.

@return Path to CA file. null if no CA file to set.
app/src/main/java/org/hyperledger/besu/cli/options/EthstatsOptions.java