@Override
  public Iterator<String> iterator() {
    final Set<String> profileNames = new TreeSet<>(InternalProfileName.getInternalProfileNames());
    profileNames.addAll(ProfileFinder.getExternalProfileNames());
    return profileNames.iterator();
  }
Create a new instance of ProfilesCompletionCandidates. This constructor is required for
Picocli.
app/src/main/java/org/hyperledger/besu/cli/config/ProfilesCompletionCandidates.java