Change record status: 
Project: 
Introduced in branch: 
10.3.x
Introduced in version: 
10.3.0
Description: 

\Drupal\Component\Plugin\Discovery\DerivativeDiscoveryDecorator now implements \Drupal\Component\Plugin\Discovery\CachedDiscoveryInterface to allow clearing its statically cached derivers. You may need to account for that if you extend DerivativeDiscoveryDecorator (or Drupal\Core\Plugin\Discovery\ContainerDerivativeDiscoveryDecorator which itself extends DerivativeDiscoveryDecorator).

Impacts: 
Module developers