docs: public Observable<ServiceResponse<Person>> createWithServiceResponseAsync(String personGroupId, CreatePersonGroupPersonsOptionalParameter createOptionalParameter) {
          if (this.client.azureRegion() == null) {
              throw new IllegalArgumentException("Parameter this.client.azureRegion() is required and cannot be null.");
          }
          if (personGroupId == null) {
              throw new IllegalArgumentException("Parameter personGroupId is required and cannot be null.");
          }
          final String name = createOptionalParameter != null ? createOptionalParameter.name() : null;
          final String userData = createOptionalParameter != null ? createOptionalParameter.userData() : null;
  
          return createWithServiceResponseAsync(personGroupId, name, userData);
      }