Drupal 9 Deprecated Code Report

drupal-check against views_negate 8.x-1.x-dev (30 Nov 2019)

➜  d9readiness vendor/mglaman/drupal-check/drupal-check web/modules/contrib/views_negate
 3/3 [▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 100%

 ------ --------------------------------------------------------------------------
  Line   views_negate.views.inc
 ------ --------------------------------------------------------------------------
  12     Call to deprecated method entityManager() of class Drupal:
         in Drupal 8.0.0 and will be removed before Drupal 9.0.0.
         Use \Drupal::entityTypeManager() instead in most cases. If the needed
         method is not on \Drupal\Core\Entity\EntityTypeManagerInterface, see the
         deprecated \Drupal\Core\Entity\EntityManager to find the
         correct interface or service.
 ------ --------------------------------------------------------------------------


 [ERROR] Found 1 error

Upgrade status report warning against views_negate 8.x-1.x-dev (30 Nov 2019)

Add core_version_requirement: ^8 || ^9 to views_negate.info.yml to designate that the module is compatible with Drupal 9. See https://www.drupal.org/node/3070687.