code: public ServiceFuture<List<SasTokenInformationInner>> listSasTokensAsync(final String resourceGroupName, final String accountName, final String storageAccountName, final String containerName, final ListOperationCallback<SasTokenInformationInner> serviceCallback) {
          return AzureServiceFuture.fromPageResponse(
              listSasTokensSinglePageAsync(resourceGroupName, accountName, storageAccountName, containerName),
              new Func1<String, Observable<ServiceResponse<Page<SasTokenInformationInner>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<SasTokenInformationInner>>> call(String nextPageLink) {
                      return listSasTokensNextSinglePageAsync(nextPageLink);
                  }
              },
              serviceCallback);
      }
docs: Gets the SAS token associated with the specified Data Lake Analytics and Azure Storage account and container combination.
  
  @param resourceGroupName The name of the Azure resource group.
  @param accountName The name of the Data Lake Analytics account.
  @param storageAccountName The name of the Azure storage account for which the SAS token is being requested.
  @param containerName The name of the Azure storage container for which the SAS token is being requested.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object