import { LazyArg } from "@tsplus/stdlib/data/Function";
import { Stream } from "@effect/core/stream/Stream/definition";
import { Maybe } from "@tsplus/stdlib/data/Maybe/definition";
/**
 * Extracts the optional value, or returns the given 'default'.
 * @tsplus static effect/core/stream/Stream.Aspects someOrElse
 * @tsplus pipeable effect/core/stream/Stream someOrElse
 * @tsplus location "@effect/core/stream/Stream/operations/someOrElse"
 */
export declare function someOrElse<A2>(def: LazyArg<A2>): <R, E, A>(self: import("../definition").Stream<R, E, import("@tsplus/stdlib/data/Maybe").Maybe<A>>) => import("../definition").Stream<R, E, A2 | A>;
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