Function undoNullWidening

packages/ai-utils/src/transforms.ts:121–124

(value: T, map?: NullWideningMap)

 * correctly. With no map, the value is returned untouched.
 */
export function undoNullWidening<T>(value: T, map?: NullWideningMap): T {
  if (!map) return value
  return walk(value, map) as T
}