Error: Call to undefined method Drupal\group\Entity\Storage\GroupStorage::revisionIds()

Problem/Motivation

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Error: Call to undefined method Drupal\group\Entity\Storage\GroupStorage::revisionIds() in Drupal\content_moderation_notifications\Notification->sendNotification() (line 165 of modules/contrib/content_moderation_notifications/src/Notification.php).

Issue is reproduced when moving a Group state from In-review to Draft.

Proposed resolution

Need to check if revisionIds method exist