export declare class ObservableMap<K, V> extends Map<K, V> {
    _set_listener?: (name: K, val: V) => void;
    _delete_listener?: (name: K) => void;
    set(name: K, item: V): this;
    get(name: K): V;
    delete(name: K): boolean;
    addSetListener(listener: (name: K, val: V) => void): void;
    addDeleteListener(listener: (name: K) => void): void;
}