import { Stream } from "@effect/core/stream/Stream/definition";
import { Chunk } from "@tsplus/stdlib/collections/Chunk/definition";
import { Maybe } from "@tsplus/stdlib/data/Maybe/definition";
import { Channel } from "@effect/core/stream/Channel/definition/base";
/**
 * Creates a stream that groups on adjacent keys, calculated by function f.
 * @tsplus static effect/core/stream/Stream.Aspects groupAdjacentBy
 * @tsplus pipeable effect/core/stream/Stream groupAdjacentBy
 * @tsplus location "@effect/core/stream/Stream/operations/groupAdjacentBy"
 */
export declare function groupAdjacentBy<A, K>(f: (a: A) => K): <R, E>(self: import("../definition").Stream<R, E, A>) => import("../definition").Stream<R, E, readonly [K, import("@tsplus/stdlib/collections/Chunk").Chunk<A>]>;
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