export type KeyMirror<Keys extends string[]> = {
  readonly [K in Keys[number]]: K;
};

export function keyMirror<Keys extends string[]>(
  ...inputs: Keys
): KeyMirror<Keys> {
  const mirrored = inputs.reduce(
    (acc, key) => ({ ...acc, [key]: key }),
    {} as KeyMirror<Keys>
  );

  return Object.freeze(mirrored);
}