code: public Observable<Void> exportAsync(String vaultName, String resourceGroupName) {
          return exportWithServiceResponseAsync(vaultName, resourceGroupName).map(new Func1<ServiceResponse<Void>, Void>() {
              @Override
              public Void call(ServiceResponse<Void> response) {
                  return response.body();
              }
          });
      }
docs: Exports all jobs for a given Shared Access Signatures (SAS) URL. The SAS URL expires within 15 minutes of its creation.
  
  @param vaultName The name of the Recovery Services vault.
  @param resourceGroupName The name of the resource group associated with the Recovery Services vault.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceResponse} object if successful.