import { Subject } from 'rxjs';
import * as i0 from "@angular/core";
export declare class CacheService {
    private cache;
    requestSubjects: Map<string, Subject<any>>;
    get<T>(key: string): T | null;
    set(key: string, value: any, ttl: number): void;
    clear(): void;
    delete(key: string): boolean;
    static ɵfac: i0.ɵɵFactoryDeclaration<CacheService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<CacheService>;
}