package preface

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type ('a, 'b) t = ('a, 'b) Arrow.t

The type held by the Arrow_choice.

val choose : ('a, 'b) t -> ('c, 'd) t -> (('a, 'c) Preface_core.Shims.Either.t, ('b, 'd) Preface_core.Shims.Either.t) t

Split the input between the two argument arrows, retagging and merging their outputs.

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