import { OnModuleDestroy } from '@nestjs/common';
import { Observable } from 'rxjs';
import { PickerEvent } from './picker-event';
import { Type } from "@pickerjs/common/lib/shared-types";
export declare type EventHandler<T extends PickerEvent> = (event: T) => void;
export declare type UnsubscribeFn = () => void;
export declare class EventBus implements OnModuleDestroy {
    private subscriberMap;
    private eventStream;
    private destroy$;
    /**
     * @description
     * 发布任何订阅者都可以响应的事件。
     * @param event
     */
    publish<T extends PickerEvent>(event: T): void;
    /**
     * @description
     * 返回给定类型的RxJS可观察事件流。
     */
    ofType<T extends PickerEvent>(type: Type<T>): Observable<T>;
    /** @internal */
    onModuleDestroy(): any;
}