import './utils/disposable';
import type { EventHandler, Unsubscribe } from './types';
export declare class SubscriptionManager implements Disposable {
    private handlers;
    private lastMessages;
    on(event: string, handler: EventHandler): Unsubscribe;
    once(event: string, handler: EventHandler): Unsubscribe;
    off(event: string, handler?: EventHandler): void;
    emit(event: string, data: unknown, raw?: unknown): void;
    getLastMessage(event: string): unknown | undefined;
    stream(event: string, signal?: AbortSignal): AsyncGenerator<unknown>;
    offAll(): void;
    [Symbol.dispose](): void;
}