code: public Observable<CloudTask> getAsync(String jobId, String taskId, TaskGetOptions taskGetOptions) {
          return getWithServiceResponseAsync(jobId, taskId, taskGetOptions).map(new Func1<ServiceResponseWithHeaders<CloudTask, TaskGetHeaders>, CloudTask>() {
              @Override
              public CloudTask call(ServiceResponseWithHeaders<CloudTask, TaskGetHeaders> response) {
                  return response.body();
              }
          });
      }
docs: Gets information about the specified task.
  For multi-instance tasks, information such as affinityId, executionInfo and nodeInfo refer to the primary task. Use the list subtasks API to retrieve information about subtasks.
  
  @param jobId The ID of the job that contains the task.
  @param taskId The ID of the task to get information about.
  @param taskGetOptions Additional parameters for the operation
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the CloudTask object