Drupal9 Migrationcalendar2020-06-03 · 1 min read · drupal drupal9 migration ·Share on: twitterfacebooklinkedincopySee:https://www.acquia.com/sites/acquia.com/files/documents/2020-03/Acquia%20Ultimate%20Guide%20to%20Drupal%209.pdfhttps://dev.acquia.com/drupal9https://github.com/mglaman/drupal-checkhttps://phpstan.org/user-guide/getting-started