import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class SessionCache<K = any, V = any> {
    private map;
    get(key: K, fallback: () => Observable<V>): Observable<V>;
    remove(key: K): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<SessionCache<any, any>, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SessionCache<any, any>>;
}