auto type = mlir::cast<TensorType>(global_tensor.getType());
    return RankedTensorType::get(
        {}, TF::ResourceType::get({type}, type.getContext()));
  }

  if (auto asset = llvm::dyn_cast<AssetOp>(op)) {
    return RankedTensorType::get({}, TF::StringType::get(asset.getContext()));
  }

  op->emitError() << "unknown symbol operation";
  return {};
}