export declare class MapG<K, V> extends Map<K, V> {
    static require<K, V>(map: Map<K, V>, key: K): V & ({} | null);
    static guarantee<K, V>(map: Map<K, V>, key: K, make: () => V): V;
    array(): [K, V][];
    require(key: K): V & ({} | null);
    guarantee(key: K, make: () => V): V;
}
export type Identifiable<Id = any> = {
    id: Id;
};
export declare class Pool<V extends Identifiable> extends MapG<V["id"], V> {
    got(value: V): boolean;
    add(value: V): V;
    remove(value: V): boolean;
}
/** @deprecated renamed to `MapG`, to avoid confusion with vectors like Vec2 */
export declare const Map2: typeof MapG;