/**
* Adds required theme configuration fields to form
*
* @param FormBuilderInterface $builder
*/
public function addFormFields(FormBuilderInterface $builder)
{
$this->builder = $builder;
$this->form = $builder->getForm();
foreach ($this->configuration->documentElement->getElementsByTagName('fieldset') as $fieldset) {
$this->addFieldset($fieldset);
}
}
