Swapping an anonymous function call with an Invoke Class

new.php

$collection = $itemCollection
	->map(new EnsureIsItem());
	
class EnsureIsItem {
	/**
	 * Construct a new instance of the class.
	 */
	public function __construct() {
	}

	/**
	 * Ensures a passed Item, is either an instance of Item or creates an instance
	 * using the passed in array data. This is intended to be called as part of a
	 * Collection based map operation like so.
	 *
	 * $collection->map(new EnsureIsItem());
	 *
	 * @param multi $item Either an instance of the Entity/Item class or an array
	 *                    from which we can construct a new instance.
	 * @param int $key The current key for the item in the Collection.
	 * @return \App\Model\Entity\Item Returns either the passed instance of Item
	 *                                or returns a new Instance.
	 */
	public function __invoke($item, $key) {
		if (!($item instanceof Item)) {
			$item = new Item($item);
		}

		return $item;
	}
}

original.php

$ensureIsItem = function ($item, $key) {
	if (!($item instanceof Item)) {
		$item = new Item($item);
  }

	return $item;
};

$collection = $itemCollection
	->map($ensureIsItem);