code: public Observable<Void> triggerAsync(String vaultName, String resourceGroupName, String jobName) {
          return triggerWithServiceResponseAsync(vaultName, resourceGroupName, jobName).map(new Func1<ServiceResponse<Void>, Void>() {
              @Override
              public Void call(ServiceResponse<Void> response) {
                  return response.body();
              }
          });
      }
docs: Cancels a job. This is an asynchronous operation. To know the status of the cancellation, call GetCancelOperationResult API.
  
  @param vaultName The name of the recovery services vault.
  @param resourceGroupName The name of the resource group where the recovery services vault is present.
  @param jobName Name of the job to cancel.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceResponse} object if successful.