Code review comment for lp://staging/~free.ekanayaka/storm/tpc-support

> [1]
> + global_transaction_id = getattr(txn, "__storm_transaction_id__",
> None)
>
> Ideally, we would store this on an external object, but on something that we
> control instead. Maybe on the ZStorm instance, using a WeakKeyDictionary?

We would *not*, sorry.