https://api.drupal.org/api/drupal/core%21modules%21field_ui%21src%21FieldConfigListBuilder.php/11.x
FieldConfigListBuilder.php | Drupal API
phpdrupalapi
https://api.drupal.org/api/drupal/core%21modules%21field_ui%21src%21FieldConfigListBuilder.php/function/FieldConfigListBuilder%3A%3AgetDefaultOperations/9
function FieldConfigListBuilder::getDefaultOperations | Drupal API
functiondrupalapi