/**
* {@inheritdoc}
*/
public function validateConfigurationForm(array &$form, FormStateInterface $form_state)
{
parent::validateConfigurationForm($form, $form_state);
// Validate layout settings.
if ($form_state->hasValue('layout_settings')) {
$layout = $this->layoutManager->createInstance($form_state->getValue('layout'), $this->configuration['layout_settings']);
list($layout_settings_form, $layout_settings_form_state) = $this->getLayoutSettingsForm($form, $form_state);
$layout->validateConfigurationForm($layout_settings_form, $layout_settings_form_state);
// Save the layout plugin for later (so we don't have to instantiate again
// on submit.
$form_state->set('layout_plugin', $layout);
}
}
