apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/spi/oidc/ExcludeClientCredentialsClientRegistrationRepository.java/ExcludeClientCredentialsClientRegistrationRepository/iterator
class ExcludeClientCredentialsClientRegistrationRepository:  @Override
  public Iterator<ClientRegistration> iterator() {
    return this.clientRegistrationList.iterator();
  }