By mikelutz on
Change record status: 
Published (View all published change records)
Project: 
Drupal core
Introduced in branch: 
11.1.x
Introduced in version: 
11.1.0
Issue links: 
https://www.drupal.org/node/3459533
Description: 

Calling \Drupal\Component\Plugin\PluginBase->isConfigurable() is deprecated.

Use instanceof to check for if a plugin uses the ConfigurableInterface.

Example

Before:
if ($plugin->isConfigurable()) { }
After:
if ($plugin instanceof ConfigurableInterface) { }

Impacts: 
Module developers