/**
 * The following code is modified based on
 * https://github.com/nanobrowser/nanobrowser/blob/master/chrome-extension/src/background/agent/event/manager.ts
 *
 * Apache-2.0 License
 * Copyright (c) 2024 alexchenzl
 * https://github.com/nanobrowser/nanobrowser/blob/master/LICENSE
 */
import type { AgentEvent, EventType, EventCallback } from './types';
export declare class EventManager {
    private _subscribers;
    constructor();
    subscribe(eventType: EventType, callback: EventCallback): void;
    unsubscribe(eventType: EventType, callback: EventCallback): void;
    clearSubscribers(eventType: EventType): void;
    emit(event: AgentEvent): Promise<void>;
}
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