import { Observable, OperatorFunction } from 'rxjs';
import { IChangeSet } from '../IChangeSet';
export declare type ItemWithValue<TObject, TValue> = {
    item: TObject;
    value: TValue;
};
/**
 * Dynamically merges the observable which is selected from each item in the stream, and unmerges the item
 * when it is no longer part of the stream.
 * @typeparam TObject The type of the object.
 * @typeparam TKey The type of the key.
 * @typeparam TDestination The type of the destination.
 * @param observableSelector The observable selector.
 */
export declare function mergeManyItems<TObject, TKey, TDestination>(observableSelector: (value: TObject, key: TKey) => Observable<TDestination>): OperatorFunction<IChangeSet<TObject, TKey>, ItemWithValue<TObject, TDestination>>;