export declare class StringKeyedMap<V> {
    private object;
    private len;
    set(key: string, value: V): void;
    get(key: string): V;
    values(): V[];
    size(): number;
    clear(): void;
    delete(key: string): boolean;
    has(key: string): boolean;
    keys(): string[];
    static withKey<V>(items: V[], extractKey: (item: V) => string): StringKeyedMap<V>;
}