/**
* {@inheritdoc}
*/
public function validateOptionsForm(&$form, FormStateInterface $form_state)
{
parent::validateOptionsForm($form, $form_state);
$subform = $form['entity_reference_selection'];
$subform_state = new ViewsHandlerFormState($form_state);
$entity_reference_selection_selector = $this->getPluginSelector($form_state);
$entity_reference_selection_selector->validateSelectorForm($subform, $subform_state);
}
