Change record status: 
Project: 
Introduced in branch: 
9.2.x
Introduced in version: 
9.2.0
Description: 

\Drupal\Core\Layout\LayoutInterface now extends \Drupal\Core\Plugin\ContextAwarePluginInterface
This will not affect any subclasses of \Drupal\Core\Layout\LayoutDefault, the default layout plugin class.

For any custom code implementing LayoutInterface directly, use \Drupal\Core\Plugin\ContextAwarePluginTrait.

Impacts: 
Module developers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done