import { LazyArg } from "@tsplus/stdlib/data/Function";
import { Maybe } from "@tsplus/stdlib/data/Maybe/definition";
import { Effect } from "@effect/core/io/Effect/definition";
/**
 * Runs an effect when the supplied partial function matches for the given
 * value, otherwise does nothing.
 * @tsplus static effect/core/io/Effect.Ops whenCase
 * @tsplus location "@effect/core/io/Effect/operations/whenCase"
 */
export declare function whenCase<R, E, A, B>(a: LazyArg<A>, pf: (a: A) => Maybe<Effect<R, E, B>>): Effect<R, E, Maybe<B>>;
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