flush package:di-core

Block until all messages being logged have finished processing. If the MonadIO constraint can't be satisfied, then use flush' instead. Manually calling flush is not usually necessary because new does it already, if at some point you want to ensure that all messages logged until then have properly commited, then flush will block until that happens. Please see log to understand how exceptions behave in this function (hint: they behave unsurprisingly).

This is like flush, but it doesn't require a MonadIO constraint. More generally, flush' is to flush as log' is to log. So, refer to log' for more documentation on how to use this flush'.