moduleExists('workspace')) { $requirements['workspace_incompatibility'] = [ 'severity' => RequirementSeverity::Error, 'description' => t('Workspaces can not be installed when the contributed Workspace module is also installed. See the upgrade path page for more information on how to upgrade.', [ ':link' => 'https://www.drupal.org/node/2987783', ]), ]; } return $requirements; } }