public FieldStorageAddForm::fieldNameExists($value

protected FieldStorageAddForm::configureEntity

Provides the add form for entity display modes. Hierarchy class \Drupal\Core\Form\

Base class for EntityDisplay edit forms. Hierarchy class \Drupal\Core\Form\

public static FieldUiTable::reduceOrder($array, $a)

public FieldStorageConfigEditForm::buildForm(array

public static EntityViewDisplayEditFor