code: public Observable<Page<SasTokenInfoInner>> listSasTokensAsync(final String resourceGroupName, final String accountName, final String storageAccountName, final String containerName) {
          return listSasTokensWithServiceResponseAsync(resourceGroupName, accountName, storageAccountName, containerName)
              .map(new Func1<ServiceResponse<Page<SasTokenInfoInner>>, Page<SasTokenInfoInner>>() {
                  @Override
                  public Page<SasTokenInfoInner> call(ServiceResponse<Page<SasTokenInfoInner>> response) {
                      return response.body();
                  }
              });
      }
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 that contains the Data Lake Analytics account.
  @param accountName The name of the Data Lake Analytics account from which an Azure Storage account's SAS token is being requested.
  @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.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;SasTokenInfoInner&gt; object