export declare class SignalMap<K, V> {
    private _storage;
    private _structure;
    constructor(entries?: readonly (readonly [K, V])[] | null);
    get(key: K): V | undefined;
    set(key: K, value: V): this;
    delete(key: K): boolean;
    has(key: K): boolean;
    clear(): void;
    get size(): number;
    keys(): IterableIterator<K>;
    values(): IterableIterator<V>;
    entries(): IterableIterator<[K, V]>;
    forEach(callback: (value: V, key: K, map: SignalMap<K, V>) => void): void;
    [Symbol.iterator](): IterableIterator<[K, V]>;
}