TypeScript @ Lazy annotation

Lazy.ts

function Lazy<T>(target: Object, propertyKey: string | symbol, {
  get:initializer,
  enumerable,
  configurable,
  set:setter
}: TypedPropertyDescriptor<T> = {}): TypedPropertyDescriptor<T> {
  const {constructor} = target;
  if (setter) {
    throw `@Lazy can't be annotated with get ${propertyKey.toString()}() existing a setter on ${constructor.name} class!`;
  }

  return {
    get() {
      const value = initializer.call(this)
      Object.defineProperty(this, propertyKey, {
        enumerable: enumerable,
        configurable: configurable,
        get() {
          return value
        }
      });
      return value;
    }
  };
}