import type { ExtendedStore } from './type.js';
export declare class KeyValueInMemory<K extends string, V> implements ExtendedStore<K, V> {
    #private;
    get ttlSupport(): boolean;
    keys(): readonly K[];
    get(key: K): V | undefined;
    set(key: K, value: V): void;
    delete(key: K): boolean;
    clear(): void;
}