Doctrine\Common\Collections\ArrayCollection::__construct PHP Méthode

    public function __construct(array $elements = array())
    {
        $this->elements = $elements;
    }

 /**
  * Taxonomy constructor.
  *
  * @param array          $elements
  * @param MetadataDriver $metadata
  */
 public function __construct(array $elements = [], MetadataDriver $metadata = null)
 {
     parent::__construct($elements);
     if ($metadata) {
         $this->config = $metadata->getTaxonomyConfig();
     }
 }