import { Destroyable } from './destroyable.interface';
import * as i0 from "@angular/core";
declare const destroySubject: unique symbol;
export declare abstract class Destroyed implements Destroyable {
    private readonly [destroySubject];
    readonly destroyed$: import("rxjs").Observable<unknown>;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<Destroyed, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<Destroyed, never, never, {}, {}, never, never, false>;
}
export {};