/**
* {@inheritdoc}
*/
public function addAll($items)
{
if (!is_array($items) && !$items instanceof Traversable) {
throw new \InvalidArgumentException('The items must be an array or Traversable');
}
foreach ($items as $key => $value) {
if (is_array($value)) {
$value = Dictionary::fromArray($value);
}
$this->add($key, $value);
}
}
