import type { IsomorphicIterable } from "@vangware/types";
import type { GeneratorOutput } from "./types/GeneratorOutput.js";
/**
 * Returns a single instance of each item in the iterable or asynchronous
 * iterable.
 *
 * @category Generators
 * @example
 * ```typescript
 * unique([1, 2, 3, 4, 1, 2, 3, 4]); // [1, 2, 3, 4]
 * ```
 * @param iterable Iterable to be filtered.
 * @returns Generators with a single instance of each item of the iterable.
 */
export declare const unique: <Iterable_1 extends IsomorphicIterable>(
	iterable: Iterable_1,
) => GeneratorOutput<Iterable_1>;