code: public StorageBatchResult<Boolean> delete(
        String bucket, String blob, BlobSourceOption... options) {
      return delete(BlobId.of(bucket, blob), options);
    }
docs: Adds a request representing the "delete blob" operation to this batch. Calling {@link
  StorageBatchResult#get()} on the return value yields {@code true} upon successful deletion,
  {@code false} if the blob was not found, or throws a {@link StorageException} if the operation
  failed.