import { GroupBy } from "@effect/core/stream/GroupBy/definition/base";
/**
 * Only consider the first `n` groups found in the stream.
 * @tsplus fluent ets/GroupBy first
 * @tsplus location "@effect/core/stream/GroupBy/operations/first"
 */
export declare function first_<R, E, K, V, A>(self: GroupBy<R, E, K, V, A>, n: number): GroupBy<R, E, K, V, A>;
/**
 * Only consider the first `n` groups found in the stream.
 * @tsplus static ets/GroupBy/Aspects first
 * @tsplus pipeable ets/GroupBy first
 * @tsplus location "@effect/core/stream/GroupBy/operations/first"
 */
export declare const first: (n: number) => <R, E, K, V, A>(self: import("../definition").GroupBy<R, E, K, V, A>) => import("../definition").GroupBy<R, E, K, V, A>;
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