import type { Curried } from '../../compositions/curry.js';
import type { MaybePromise, Series, StaticSeries, SyncSeries } from '../../controls/types.js';
declare const _syncDifferenceBy: <T, U>(input: SyncSeries<T>, other: StaticSeries<U>, key: (value: T) => U) => Generator<T>;
declare const _asyncDifferenceBy: <T, U>(input: Series<T>, other: StaticSeries<U>, key: (value: Awaited<T>) => MaybePromise<U>) => AsyncGenerator<Awaited<T>>;
export declare function differenceBySync<T, U>(...args: Parameters<typeof _syncDifferenceBy<T, U>>): ReturnType<typeof _syncDifferenceBy<T, U>>;
export declare function differenceBySync<T, U>(...args: Parameters<Curried<typeof _syncDifferenceBy<T, U>>>): ReturnType<Curried<typeof _syncDifferenceBy<T, U>>>;
export declare function differenceByAsync<T, U>(...args: Parameters<typeof _asyncDifferenceBy<T, U>>): ReturnType<typeof _asyncDifferenceBy<T, U>>;
export declare function differenceByAsync<T, U>(...args: Parameters<Curried<typeof _asyncDifferenceBy<T, U>>>): ReturnType<Curried<typeof _asyncDifferenceBy<T, U>>>;
export declare namespace differenceBy {
    const sync: typeof differenceBySync;
    const async: typeof differenceByAsync;
}
export {};
//# sourceMappingURL=difference-by.d.ts.map