import { IObservable } from '../internal/Observable';
export declare type UniqueWithType = {
    <T>(set: Set<T>, source: IObservable<T>): IObservable<T>;
    <T>(set: Set<T>): {
        (source: IObservable<T>): IObservable<T>;
    };
};
export declare const uniqueWith: UniqueWithType;
export declare const unique: <T>(source: IObservable<T>) => IObservable<T>;