import { LazyArg } from "@tsplus/stdlib/data/Function";
import { Maybe } from "@tsplus/stdlib/data/Maybe/definition";
import { Stream } from "@effect/core/stream/Stream/definition";
/**
 * Returns the resulting stream when the given partial function is defined
 * for the given value, otherwise returns an empty stream.
 * @tsplus static effect/core/stream/Stream.Ops whenCase
 * @tsplus location "@effect/core/stream/Stream/operations/whenCase"
 */
export declare function whenCase<R, E, A, A1>(a: LazyArg<A>, pf: (a: A) => Maybe<Stream<R, E, A1>>): Stream<R, E, A1>;
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