import { HttpRequest } from '@angular/common/http';
import { ResourceCache } from './resource-cache';
import { ResourceCacheItem, ResourceCacheItemPromisable } from './resource-cache-item';
/**
 * This is a cache class that implements the cache interface, but does no actual caching.
 */
export declare class ResourceNoopCache implements ResourceCache {
    constructor();
    put(_request: HttpRequest<any>, obj: ResourceCacheItemPromisable): ResourceCacheItemPromisable;
    pop(_request: HttpRequest<any>): ResourceCacheItemPromisable;
    get(_request: HttpRequest<any>): ResourceCacheItemPromisable;
    has(_request: HttpRequest<any>): boolean;
    populate(_urlAttr: string, _items: ResourceCacheItem[]): void;
    invalidate(): void;
}