Expanded class hierarchy of Element in Express 8
- class \Drupal\bootstrap\Utility\ArrayObject implements \Drupal\bootstrap\Utility\IteratorAggregate, \Drupal\bootstrap\Utility\ArrayAccess, \Drupal\bootstrap\Utility\Serializable, \Drupal\bootstrap\Utility\Countable, RefinableCacheableDependencyInterface, AttachmentsInterface
- class \Drupal\bootstrap\Utility\Attributes
- class \Drupal\bootstrap\Utility\DrupalAttributes