code: public Observable<Page<StorageAccountItem>> getStorageAccountsAsync(final String vaultBaseUrl, final Integer maxresults) {
          return getStorageAccountsWithServiceResponseAsync(vaultBaseUrl, maxresults)
              .map(new Func1<ServiceResponse<Page<StorageAccountItem>>, Page<StorageAccountItem>>() {
                  @Override
                  public Page<StorageAccountItem> call(ServiceResponse<Page<StorageAccountItem>> response) {
                      return response.body();
                  }
              });
      }
docs: List storage accounts managed by the specified key vault. This operation requires the storage/list permission.
  
  @param vaultBaseUrl The vault name, for example https://myvault.vault.azure.net.
  @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;StorageAccountItem&gt; object