https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Form%21FormBuilderInterface.php/interface/implements/FormBuilderInterface/10
FormBuilderInterface | Drupal API
drupalapi
https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Form%21FormBuilderInterface.php/function/FormBuilderInterface%3A%3AbuildForm/11.x
function FormBuilderInterface::buildForm | Drupal API
functionbuildformdrupalapi