import { EventName, type EventHandler, type EventMessage } from './types';
export declare abstract class BaseEventSource {
    protected events: TaroGeneral.Events;
    private isClosed;
    abstract start(): void;
    abstract abort(): void;
    on(eventName: EventName, handler: EventHandler): this;
    off(eventName?: EventName, handler?: EventHandler): this;
    trigger(eventName: EventName, args?: Pick<EventMessage, 'data' | 'errMsg'>): this;
}