/**
 * Retrieves the value associated with the given key from a Map.
 *
 * @param map - A Map instance to retrieve the value from.
 * @param key - The key whose associated value is to be returned.
 * @returns - The value associated with the specified key.
 * @throws - If the key is not found in the map.
 */
export declare function safeGet<K, V>(map: Map<K, V>, key: K | undefined): V;
/**
 * Retrieves the value associated with the given key from a WeakMap.
 *
 * @param map - A WeakMap instance to retrieve the value from.
 * @param key - The key whose associated value is to be returned.
 * @returns - The value associated with the specified key.
 * @throws - If the key is not found in the weakmap.
 */
export declare function safeGet<K extends object, V>(map: WeakMap<K, V>, key: K | undefined): V;