Change record status: 
Project: 
Introduced in branch: 
2.0.x
Introduced in version: 
2.0.0
Description: 

Because we can now also group config.

Old code

  $group->getContentEntities();
  $group->getContentEntities($plugin_id);

New code

  $group->getRelatedEntities();
  $group->getRelatedEntities($plugin_id);
Impacts: 
Module developers