The ImmediateIO and TransactionalIO types implement Sync for all contained
Expander<EI> types regardless of if the Expander itself is safe to use
across threads.
As the IO types allow retrieving the Expander, this can lead to non-thread
safe types being sent across threads as part of the Expander leading to data
races.
{
"license": "CC0-1.0"
}