import { AsyncIterableLike } from "../async-like";
import { AsyncRetainerWithHas, RetainerWithHas } from "./retain";
export type DistinctEqualFn<T> = (left: T, right: T) => boolean;
export type DistinctEqualAsyncFn<T> = (left: T, right: T) => boolean | Promise<boolean>;
export declare function distinctRetainer<T>(equalityFn?: DistinctEqualFn<T>): RetainerWithHas<T>;
export declare function distinct<T, This, Parent>(iterable: Iterable<T>, equalityFn?: DistinctEqualFn<T>): Iterable<T>;
export declare function asyncDistinctRetainer<T>(equalityFn?: DistinctEqualAsyncFn<T>): RetainerWithHas<T> | AsyncRetainerWithHas<T>;
export declare function asyncDistinct<T, This, Parent>(iterable: AsyncIterableLike<T>, equalityFn?: DistinctEqualAsyncFn<T>): AsyncIterable<T>;