import { IScheduler } from '../Scheduler';
import { Subscriber } from '../Subscriber';
import { Observable } from '../Observable';
import { TeardownLogic } from '../Subscription';
export interface DispatchArg<T> {
    subscriber: Subscriber<T>;
}
/**
 * We need this JSDoc comment for affecting ESDoc.
 * @extends {Ignored}
 * @hide true
 */
export declare class EmptyObservable<T> extends Observable<T> {
    private scheduler;
    /**
     * Creates an Observable that emits no items to the Observer and immediately
     * emits a complete notification.
     *
     * <span class="informal">Just emits 'complete', and nothing else.
     * </span>
     *
     * <img src="./img/empty.png" width="100%">
     *
     * This static operator is useful for creating a simple Observable that only
     * emits the complete notification. It can be used for composing with other
     * Observables, such as in a {@link mergeMap}.
     *
     * @example <caption>Emit the number 7, then complete.</caption>
     * var result = Rx.Observable.empty().startWith(7);
     * result.subscribe(x => console.log(x));
     *
     * @example <caption>Map and flatten only odd numbers to the sequence 'a', 'b', 'c'</caption>
     * var interval = Rx.Observable.interval(1000);
     * var result = interval.mergeMap(x =>
     *   x % 2 === 1 ? Rx.Observable.of('a', 'b', 'c') : Rx.Observable.empty()
     * );
     * result.subscribe(x => console.log(x));
     *
     * // Results in the following to the console:
     * // x is equal to the count on the interval eg(0,1,2,3,...)
     * // x will occur every 1000ms
     * // if x % 2 is equal to 1 print abc
     * // if x % 2 is not equal to 1 nothing will be output
     *
     * @see {@link create}
     * @see {@link never}
     * @see {@link of}
     * @see {@link throw}
     *
     * @param {Scheduler} [scheduler] A {@link IScheduler} to use for scheduling
     * the emission of the complete notification.
     * @return {Observable} An "empty" Observable: emits only the complete
     * notification.
     * @static true
     * @name empty
     * @owner Observable
     */
    static create<T>(scheduler?: IScheduler): Observable<T>;
    static dispatch<T>(arg: DispatchArg<T>): void;
    constructor(scheduler?: IScheduler);
    protected _subscribe(subscriber: Subscriber<T>): TeardownLogic;
}
