*   Faster and more stable Google Cloud Storage (GCS) filesystem support
*   Support for zlib compression and decompression for TFRecordReader and
    TFRecordWriter
*   Support for reading (animated) GIFs
*   Improved support for SparseTensor
*   Added support for more probability distributions (Dirichlet, Beta,
    Bernoulli, etc.)
*   Added Python interfaces to reset resource containers.

    } else {
      // TODO(allenl): Figure out why using zeros_like everywhere causes issues
      // for some gradient functions and if there's another way to work around
      // it (e.g. conds instead of ifs). The value shouldn't really matter.
      TF_RETURN_IF_ERROR(vspace_.BuildOnesLike(output_tensor, &aid));
    }
    if (TF_PREDICT_FALSE(aid == nullptr)) {
      return tensorflow::errors::Internal(