Symfony\Component\Form\Form::getIterator PHP Method

    public function getIterator()
    {
        return new \ArrayIterator($this->children);
    }

 /**
  * @param Form $form
  * @return array
  */
 public static function getFormAsArray(Form $form)
 {
     $formTypesData = array();
     $formTypes = $form->getIterator();
     foreach ($formTypes as $formType) {
         /** @var Form $formType */
         $formTypesData[$formType->getName()] = $formType->getData();
     }
     return $formTypesData;
 }