Change record status: 
Project: 
Introduced in branch: 
8.8.x
Introduced in version: 
8.8.0
Description: 

In order to minimize the need to include files containing constants in the global namespace, a new class \Drupal\Core\Requirements has been created and four global constants have been deprecated.

Instead of REQUIREMENT_INFO, use \Drupal\Core\Requirements::SEVERITY_INFO instead.

Instead of REQUIREMENT_OK, use \Drupal\Core\Requirements::SEVERITY_OK instead.

Instead of REQUIREMENT_WARNING, use \Drupal\Core\Requirements::SEVERITY_WARNING instead.

Instead of REQUIREMENT_ERROR, use \Drupal\Core\Requirements::SEVERITY_ERROR instead.

Impacts: 
Module developers