import type { EqualFn } from '../types/functions/mod';
export interface NubBy {
    <T>(fn: EqualFn<T>, iter: AsyncIterable<T>): AsyncIterable<T>;
    <T>(fn: EqualFn<T>): (iter: AsyncIterable<T>) => AsyncIterable<T>;
}
export declare const nubBy: NubBy;
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