ÿØÿÛC  ÿØÿÛC  is_array($item) ? new static::$base($item) : $item, $items instanceof Collection ? $items->toArray() : $items ); parent::__construct($items); } /** * Append items to the collection, mutating it. * * @param T[]|array[] $items */ public function concat($items) { foreach ($items as $item) { $this->push(is_array($item) ? new static::$base($item) : $item); } return $this; } public function toArray(): array { return array_map( fn($item) => $item instanceof Arrayable ? $item->toArray() : $item, $this->items ); } }