ConfirmFormInterface

class \Drupal\Core\Entity\ContentEntityConfirmFormBase implements \Drupal\Core\Form\ConfirmFormInterface extends \Drupal\Core\Entity\ContentEntityForm
class \Drupal\Core\Entity\ContentEntityDeleteForm uses \Drupal\Core\Entity\EntityDeleteFormTrait extends \Drupal\Core\Entity\ContentEntityConfirmFormBase
class \Drupal\Core\Entity\EntityConfirmFormBase implements \Drupal\Core\Form\ConfirmFormInterface extends \Drupal\Core\Entity\EntityForm
class \Drupal\Core\Entity\EntityDeleteForm uses \Drupal\Core\Entity\EntityDeleteFormTrait extends \Drupal\Core\Entity\EntityConfirmFormBase

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