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kotlinlang

upgrading to coroutines 0.20… mostly seamless :slightly_smiling_face: it also introduced a couple compilation errors, which was the first time an upgrade has done that

Sorry for that. We had to clean up both `ActorJob` and `ProducerJob` since they really represented an extra, unnecessary abstraction

no worries. this was comparatively old code, written before the focus on parent/child relationships. the new solution with a managing parent job is clean.

and apparently before `CoroutineStart.LAZY` was a thing, because I was initializing these in a `lazy` delegate, which had something to do with type inference compilation errors i got after upgrading