Declaration of Drupal\social_demo\Plugin\DemoContent\EventType::createContent() must be compatible with DemoTaxonomyTerm::createContent

Problem/Motivation

When running command drush sda event_type you will see fatal error:

Fatal error: Declaration of Drupal\social_demo\Plugin\DemoContent\EventType::createContent() must be compatible with Drupal\social_demo\DemoTaxonomyTerm::createContent($generate = false, $max = NULL) in /var/www/html/profiles/contrib/social/modules/custom/social_demo/src/Plugin/DemoContent/EventType.php on line 18

Proposed resolution

We should make it compatible with the parent method.