https://api.drupal.org/api/drupal/core%21modules%21node%21src%21NodeTypeForm.php/property/NodeTypeForm%3A%3AentityFieldManager/9
NodeTypeForm::$entityFieldManager | Drupal API
drupalapi
https://api.drupal.org/api/drupal/core%21modules%21node%21src%21NodeTypeForm.php/function/NodeTypeForm%3A%3Aform/8.9.x
function NodeTypeForm::form | Drupal API
functionformdrupalapi