/**
 * A default map allows for a generator producing values automatically if you want to add something to a map that does not have a value associated with a given key.
 * This does not implement the default map interface as return types (and some future methods may) change
 */
export declare class DefaultMap<K, V = K> {
    /** the internal map the default map wraps around */
    private readonly internal;
    /** generator function to produce a default value for a given key */
    private readonly generator;
    /**
     * @param generator - the generator to produce a default value for a given key
     * @param map       - the initial map to start with
     */
    constructor(generator: (k: K) => V, map?: Map<K, V>);
    /**
     * Sets a value for a given key.
     * As you provide value, this does not invoke the generator!
     */
    set(k: K, v: V): this;
    /**
     * Return a value for the given key, if the key does not exist within the default map,
     * this will invoke the generator and assign the produced value.
     */
    get(k: K): V;
    /**
     * Iterates over all entries that have been set (explicitly or by the generator)
     */
    entries(): MapIterator<[K, V]>;
    /** returns only the keys really stored in the map */
    keys(): MapIterator<K>;
    values(): MapIterator<V>;
    delete(k: K): boolean;
    size(): number;
}