import KValue from './kvalue';
export default class Mapping<T = any> {
    _map: Map<string, KValue<T>>;
    constructor();
    get keys(): string[];
    get values(): KValue<T>[];
    get(key: string): T | undefined;
    getKV(key: string): KValue<T> | undefined;
    set(key: string, value?: T): void;
    delete(key: string, cb?: (value?: T, key?: string) => void): void;
    clear(): void;
    clean(max?: number, cb?: (value?: T, key?: string) => void): void;
}