import { Observable } from "rxjs";
export declare type ComponentWithOnDestroyObservable = {
    observeOnDestroy(): Observable<void>;
};
export declare class OnDestroyMixin {
    constructor();
    observeOnDestroy(): any;
    ngOnDestroy(): void;
}
export declare function componentDestroyed(target: ComponentWithOnDestroyObservable): Observable<void>;
export declare function untilComponentDestroyed<T>(component: ComponentWithOnDestroyObservable): (source: Observable<T>) => Observable<T>;