import { HttpCacheStore } from './http-cache-store';
import { HttpCacheEntry } from './types';
export declare class HttpCacheStorePrefixDecorator implements HttpCacheStore {
    /**
     * The label use to prefix any entry identifier.
     */
    private prefix;
    /**
     * The label used to separate the prefix and the entry identifier.
     */
    private separator;
    /**
     * The http cache store to decorate.
     */
    private store;
    constructor(store: HttpCacheStore, prefix?: string, separator?: string);
    /**
     * Computes the entry identifier by concatenating the store prefix with
     * the base identifier.
     */
    private getPrefixedIdentifier;
    /**
     * @inheritdoc
     */
    get<HttpResponseT>(entryIdentifier: string): HttpCacheEntry<HttpResponseT> | undefined;
    /**
     * @inheritdoc
     */
    put<HttpResponseT>(entryIdentifier: string, entry: HttpCacheEntry<HttpResponseT>): () => void;
    /**
     * @inheritdoc
     */
    has(entryIdentifier: string): boolean;
    /**
     * @inheritdoc
     */
    delete(entryIdentifier: string): void;
    /**
     * @inheritdoc
     */
    entries(): HttpCacheEntry<unknown>[];
    /**
     * @inheritdoc
     */
    flush(): void;
}