import type EventBusDelegate from '../EventBusDelegate';
/**
 * Mitt-based implementation of the EventBusDelegate.
 * Provides strongly-typed pub/sub plus a simple "last value" cache.
 */
export declare class MittEventBusDelegate<EventMap extends Record<string, any>> implements EventBusDelegate<EventMap> {
    private emitter;
    private lastEnvelope;
    constructor();
    init(onInit: () => void): void;
    /** Returns the underlying mitt emitter instance */
    getInstance(): any;
    emit<K extends keyof EventMap>(type: K, payload: EventMap[K]): void;
    on<K extends keyof EventMap>(type: K, handler: (payload: EventMap[K]) => void): {
        unsubscribe: () => void;
    };
    getValue(): {
        type: string | undefined;
        payload: unknown;
    } | null;
    clear(): void;
}