export default class ReactiveWeakMap<K extends object, V> implements WeakMap<K, V> {
    private source;
    private atom;
    private collection?;
    constructor(source: WeakMap<K, V>);
    delete(key: K): boolean;
    get [Symbol.toStringTag](): string;
    get(key: K): V | undefined;
    set(key: K, value: V): this;
    has(key: K): boolean;
}