/**
 * A map that works just like a regular map, but throws when attempting to get a
 * key that is not in the map (effectively adding a type assertion to `get()`).
 * Because `get()` returns `V` instead of `V | undefined` this makes life in
 * TypeScript somewhat easier. Use this module by importing from
 * `@sirpepe/shed/UnsafeMap`.
 */
export declare class UnsafeMap<K, V> extends Map<K, V> {
    errorFactory: (key: K) => Error;
    constructor(entries?: Iterable<[K, V]>, errorFactory?: (key: K) => Error);
    get(key: K): V;
}