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<?php
namespace Drupal\Core\Entity;
/**
* Provides methods for an entity to support revisions.
*/
interface RevisionableInterface {
/**
* Determines whether a new revision should be created on save.
*
* @return bool
* TRUE if a new revision should be created.
*
* @see \Drupal\Core\Entity\EntityInterface::setNewRevision()
*/
public function isNewRevision();
/**
* Enforces an entity to be saved as a new revision.
*
* @param bool $value
* (optional) Whether a new revision should be saved.
*
* @throws \LogicException
* Thrown if the entity does not support revisions.
*
* @see \Drupal\Core\Entity\EntityInterface::isNewRevision()
*/
public function setNewRevision($value = TRUE);
/**
* Gets the revision identifier of the entity.
*
* @return
* The revision identifier of the entity, or NULL if the entity does not
* have a revision identifier.
*/
public function getRevisionId();
/**
* Checks if this entity is the default revision.
*
* @param bool $new_value
* (optional) A Boolean to (re)set the isDefaultRevision flag.
*
* @return bool
* TRUE if the entity is the default revision, FALSE otherwise. If
* $new_value was passed, the previous value is returned.
*/
public function isDefaultRevision($new_value = NULL);
/**
* Acts on a revision before it gets saved.
*
* @param EntityStorageInterface $storage
* The entity storage object.
* @param \stdClass $record
* The revision object.
*/
public function preSaveRevision(EntityStorageInterface $storage, \stdClass $record);
}