import { Observable } from '../core/Observable';
declare type EventEmitter = {
    addListener(event: string | symbol, listener: (...args: any[]) => void): any;
    removeListener(event: string | symbol, listener: (...args: any[]) => void): any;
};
export declare function fromEvent<T>(eventSource: EventEmitter, eventName: string | symbol): Observable<T>;
export declare function fromEvent(eventSource: EventTarget, eventName: string, capture?: boolean): Observable<Event>;
export {};