Fri, 07/16/2021 - 3:00PM CDT Drupal core deprecated an annotation property in Drupal 8 and users upgrading to Drupal 9 are experiencing issues. I'm going to see if we can write a PHPStan rule to check for usages of deprecated annotation properties. Change record: [Plugins now use the 'context\_definitions' key to define their contexts](https://www.drupal.org/node/3016699) Related issue in the Upgrade Status module: