@dillonkearns/elm-graphql/examples/src/subscription/node_modules/flow-static-land/lib/Profunctor.js.flow

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// @flow
import { HKT } from './HKT'
import type { HKT2 } from './HKT'
import type { Functor } from './Functor'

export interface Profunctor<F> extends Functor<HKT<F, *>> {
  promap<A, B, C, D>(f: (a: A) => B, g: (c: C) => D, fbc: HKT2<F, B, C>): HKT2<F, A, D>
}