'radios', '#title' => $this->t('Allowed operations'), '#options' => [ 'r' => $this->t('Accept only JSON:API read operations.'), 'rw' => $this->t('Accept all JSON:API create, read, update, and delete operations.'), ], '#config_target' => new ConfigTarget( 'jsonapi.settings', 'read_only', // Convert the bool config value to an expected string. fn($value) => $value ? 'r' : 'rw', // Convert the submitted value to a boolean before storing it in config. fn($value) => $value === 'r', ), '#description' => $this->t('Warning: Only enable all operations if the site requires it. Learn more about securing your site with JSON:API.', [':docs' => 'https://www.drupal.org/docs/8/modules/jsonapi/security-considerations']), ]; return parent::buildForm($form, $form_state); } }