import type { ODataSelect } from '../../../lib/odata';
import type { ResultsMiddleware } from '../../searchBackend';
import { ReductionResults } from '../../searchBackend';
export declare function useUniq<T extends object, Keys extends ODataSelect<T>, R extends ReductionResults<T>['values'][number]>(keySelector: (value: R) => unknown): ResultsMiddleware<T, Keys>;