import { Observable, ObservableInput, OperatorFunction } from "rxjs";
/**
 * Like exhaustMap, but also includes the trailing value emitted from the source observable while waiting for the preceding inner observable to complete
 *
 * Original code adapted from https://github.com/ReactiveX/rxjs/issues/5004
 * @param {function<T, K>(value: T, ?index: number): ObservableInput<K>} project - A function that, when applied to an item emitted by the
 * source Observable, returns a projected Observable.
 */
export declare function exhaustMapWithTrailing<T, R>(project: (value: T, index: number) => ObservableInput<R>): OperatorFunction<T, R>;
/**
 * Like exhaustMap, but also includes the trailing value emitted from the source observable while waiting for the preceding inner observable to complete
 *
 * Original code adapted from https://github.com/ReactiveX/rxjs/issues/5004
 * @param {ObservableInput} innerObservable An Observable to replace each value from
 * the source Observable.
 */
export declare function exhaustMapToWithTrailing<T, R>(innerObservable: Observable<R>): OperatorFunction<T, R>;