Eugen Wissner 61879fb124 Constrain the resolvers with MonadIO ... This replaces the most usages of MonadPlus, which is not appropriate for the resolvers, since a resolver is unambiguously chosen by the name (no need for 'mplus'), and the resolvers are often doing IO.		2019-07-08 10:15:47 +02:00
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StarWars	Constrain the resolvers with MonadIO	2019-07-08 10:15:47 +02:00