Epoch fences a replaced execution; version identifies one logical state.
They are independent: restarting a worker need not advance the learner.
8family LearningRound : Type 0
9constructor LearningRoundOf
10field unrestricted learningMembershipEpoch : Nat
11field unrestricted learningStateVersion : NatThe compiler supplied declaration spans and resolved links from this source snapshot. This page does not assert that this file belongs to a checked closure.