import { IScheduler } from '../schedulers/Scheduler';
import { IObservable } from './Observable';
import { IObserver } from './Observer';
import { ISubscription } from './Subscription';
export declare const ERROR_MESSAGE = "Test Exception";
export declare function throwError(message: string): void;
export declare class Thrower implements IObservable<void> {
    private source;
    constructor(source: IObservable<any>);
    subscribe(observer: IObserver<void>, scheduler: IScheduler): ISubscription;
}
export declare function thrower(ob: IObservable<any>): Thrower;