src/Plugin/Thunder/OptionalModule/Adsense.php
public function submitForm(array $formValues) {

    $this->configFactory->getEditable('adsense.settings')
      ->set('adsense_basic_id', (string) $formValues['adsense_basic_id'])
      ->save(TRUE);
  }
public function submitForm(array $formValues) {

    $this->configFactory->getEditable('adsense.settings')
      ->set('adsense_basic_id', (string) $formValues['adsense_basic_id'])
      ->save(TRUE);
  }
{@inheritdoc}