code: public function add(array $assets)
      {
          foreach ($assets as $type => $asset) {
              if ($asset instanceof Plugin) {
                  $this->parse($asset);
  
                  continue;
              }
  
              $this->assets[$type] = array_merge($this->assets[$type], $asset);
          }
      }
docs: Add assets to the collection
  
  @param array $assets