protected DraggableListBuilder::formBuilder()
Returns the form builder.
\Drupal\Core\Form\FormBuilderInterface The form builder.
protected function formBuilder() { if (!$this->formBuilder) { $this->formBuilder = \Drupal::formBuilder(); } return $this->formBuilder; }
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Config!Entity!DraggableListBuilder.php/function/DraggableListBuilder::formBuilder/8.1.x