code: public ServiceFuture<TrainingStatus> getTrainingStatusAsync(String personGroupId, final ServiceCallback<TrainingStatus> serviceCallback) {
          return ServiceFuture.fromResponse(getTrainingStatusWithServiceResponseAsync(personGroupId), serviceCallback);
      }
docs: Retrieve the training status of a person group (completed or ongoing).
  
  @param personGroupId Id referencing a particular person group.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object