code: public Observable<ServiceResponse<Page<DeletedStorageAccountItem>>> getDeletedStorageAccountsWithServiceResponseAsync(final String vaultBaseUrl) {
          return getDeletedStorageAccountsSinglePageAsync(vaultBaseUrl)
              .concatMap(new Func1<ServiceResponse<Page<DeletedStorageAccountItem>>, Observable<ServiceResponse<Page<DeletedStorageAccountItem>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<DeletedStorageAccountItem>>> call(ServiceResponse<Page<DeletedStorageAccountItem>> page) {
                      String nextPageLink = page.body().nextPageLink();
                      if (nextPageLink == null) {
                          return Observable.just(page);
                      }
                      return Observable.just(page).concatWith(getDeletedStorageAccountsNextWithServiceResponseAsync(nextPageLink));
                  }
              });
      }
docs: Lists deleted storage accounts for the specified vault.
  The Get Deleted Storage Accounts operation returns the storage accounts that have been deleted for a vault enabled for soft-delete. This operation requires the storage/list permission.
  
  @param vaultBaseUrl The vault name, for example https://myvault.vault.azure.net.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;DeletedStorageAccountItem&gt; object