import lru from 'lru_map';
export declare class StateCache<T> implements Iterable<[string, T]> {
    private readonly onEvicted?;
    readonly volatile: lru.LRUMap<string, T>;
    readonly durable: Map<string, T>;
    constructor(limit: number, onEvicted?: (item: T) => void);
    get(key: string): T | undefined;
    set(key: string, value: T): void;
    delete(key: string): void;
    endure(key: string, value: T): void;
    free(key: string): void;
    entries(): Generator<[string, T]>;
    keys(): Generator<string>;
    values(): Generator<T>;
    [Symbol.iterator](): Generator<[string, T], any, unknown>;
}
//# sourceMappingURL=state-cache.d.ts.map