https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Field%21FieldTypeCategoryManager.php/class/FieldTypeCategoryManager/10
class FieldTypeCategoryManager | Drupal API
classdrupalapi
https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Field%21FieldTypeCategoryManager.php/11.x
FieldTypeCategoryManager.php | Drupal API
phpdrupalapi