import type { Series, SyncSeries } from './types.js';
export declare function flattenSync<T>(input: SyncSeries<SyncSeries<T>>): Generator<T>;
export declare function flattenAsync<T>(input: Series<Series<T>>): AsyncGenerator<Awaited<T>>;
/** Flattens a series of series by one level deep. */
export declare namespace flatten {
    const sync: typeof flattenSync;
    const async: typeof flattenAsync;
}
//# sourceMappingURL=flatten.d.ts.map