code: public Observable<Page<DeletedStorageAccountItem>> getDeletedStorageAccountsNextAsync(final String nextPageLink) {
          return getDeletedStorageAccountsNextWithServiceResponseAsync(nextPageLink)
              .map(new Func1<ServiceResponse<Page<DeletedStorageAccountItem>>, Page<DeletedStorageAccountItem>>() {
                  @Override
                  public Page<DeletedStorageAccountItem> call(ServiceResponse<Page<DeletedStorageAccountItem>> response) {
                      return response.body();
                  }
              });
      }
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 nextPageLink The NextLink from the previous successful call to List operation.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;DeletedStorageAccountItem&gt; object