import { IClock } from "./time";
export declare class ExpirableCache<T> {
    private dataProvider;
    private expirationTimeInMillis;
    private data;
    private lastUpdate;
    private isExpirable;
    private clock;
    constructor(dataProvider: () => Promise<T>, expirationTimeInMillis?: number, clock?: IClock);
    forceExpiration(): void;
    get(): Promise<T>;
    _lastUpdate(): number;
}
export declare class LRUCache<K, V> {
    private dataProvider;
    private toString;
    private maxItems;
    private expirationTimeInMillis;
    private clock?;
    private data;
    constructor(dataProvider: (key: K) => () => Promise<V>, toString?: (key: K) => string, maxItems?: number, expirationTimeInMillis?: number, clock?: IClock | undefined);
    get(key: K): Promise<V>;
    get size(): number;
}
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