import "../_dnt.polyfills.js";
export declare class Notifier implements PromiseLike<void> {
    private _next;
    then<T1 = void, T2 = never>(onfulfilled?: ((value: void) => T1 | PromiseLike<T1>) | null | undefined, onrejected?: ((reason: any) => T2 | PromiseLike<T2>) | null | undefined): Promise<T1 | T2>;
    emit(): void;
}