By gábor hojtsy on
Change record status: 
Published (View all published change records)
Project: 
Drupal core
Introduced in branch: 
8.x
Introduced in version: 
8.0
Issue links: 
https://www.drupal.org/node/2044583
Description: 

A new EntityChangedInterface has been added to be used by entities which have changed timestamp information to track / provide. The interface exposes the changed timestamp via the getChangedTime() method. Implement this interface and provide this method if your entity has changed timestamp tracking, eg:

use Drupal\Core\Entity\ContentEntityInterface;
use Drupal\Core\Entity\EntityChangedInterface;

interface YourContentEntityInterface extends ContentEntityInterface, EntityChangedInterface {
 // ...
}

The EntityChangedInterface may be used in the future to facilitate edit overwrite protection on content entities as well as better caching.

Impacts: 
Module developers