import type { InitializedObservable, InitializedToInitializedOperator, Observable, ToBaseOperator } from '../types';
export declare const withLatestFrom: <A, B>(observable: Observable<B>) => ToBaseOperator<A, readonly [A, B]>;
export declare const withLatestFromI: <A, B>(observable: InitializedObservable<B>) => InitializedToInitializedOperator<A, readonly [A, B]>;
export declare const withLatest: <A, B>(observable: Observable<B>) => ToBaseOperator<A, readonly [A, B]>;
export declare const withLatestI: <A, B>(observable: InitializedObservable<B>) => InitializedToInitializedOperator<A, readonly [A, B]>;