code: public ServiceFuture<List<DeletedSasDefinitionItem>> getDeletedSasDefinitionsAsync(final String vaultBaseUrl, final String storageAccountName, final ListOperationCallback<DeletedSasDefinitionItem> serviceCallback) {
          return AzureServiceFuture.fromPageResponse(
              getDeletedSasDefinitionsSinglePageAsync(vaultBaseUrl, storageAccountName),
              new Func1<String, Observable<ServiceResponse<Page<DeletedSasDefinitionItem>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<DeletedSasDefinitionItem>>> call(String nextPageLink) {
                      return getDeletedSasDefinitionsNextSinglePageAsync(nextPageLink);
                  }
              },
              serviceCallback);
      }
docs: Lists deleted SAS definitions for the specified vault and storage account.
  The Get Deleted Sas Definitions operation returns the SAS definitions that have been deleted for a vault enabled for soft-delete. This operation requires the storage/listsas permission.
  
  @param vaultBaseUrl The vault name, for example https://myvault.vault.azure.net.
  @param storageAccountName The name of the storage account.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object