code: public Observable<Page<SasDefinitionItem>> getSasDefinitionsAsync(final String vaultBaseUrl, final String storageAccountName, final Integer maxresults) {
          return getSasDefinitionsWithServiceResponseAsync(vaultBaseUrl, storageAccountName, maxresults)
              .map(new Func1<ServiceResponse<Page<SasDefinitionItem>>, Page<SasDefinitionItem>>() {
                  @Override
                  public Page<SasDefinitionItem> call(ServiceResponse<Page<SasDefinitionItem>> response) {
                      return response.body();
                  }
              });
      }
docs: List storage SAS definitions for the given storage account. 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 maxresults Maximum number of results to return in a page. If not specified the service will return up to 25 results.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;SasDefinitionItem&gt; object