import { SimpleChange, SimpleChanges, ɵComponentDef as ComponentDef } from '@angular/core';
import { NgEvent } from './events/base-event.event';
import { Observable, ReplaySubject } from 'rxjs';
declare type Extra = boolean | SimpleChanges | SimpleChange;
export declare function createSubjectIfNotExists(context: any, Event: typeof NgEvent): ReplaySubject<Extra>;
export declare function createHookIfNotExists(component: ComponentDef<any>, Event: typeof NgEvent): void;
export declare type Pipe = (source: Observable<any>) => Observable<any>;
export declare function makeDecoratorFactory(Event: typeof NgEvent, pipe?: any): PropertyDecorator;
export {};