/**
 * A Map that automatically creates default values when accessing missing keys.
 *
 * @example
 * ```typescript
 * const countsByCategory = new DefaultMap<string, number[]>(() => []);
 * countsByCategory.get('fruits').push(1); // No need to check if key exists
 * countsByCategory.get('fruits').push(2);
 * console.log(countsByCategory.get('fruits')); // [1, 2]
 * ```
 */
export declare class DefaultMap<K, V> extends Map<K, V> {
    private defaultValueBuilder;
    constructor(defaultValueBuilder: () => V);
    /**
     * Gets the value for a key. If the key doesn't exist, creates a default value,
     * stores it, and returns it.
     */
    get(key: K): V;
}
//# sourceMappingURL=default-map.d.ts.map