code: public function toOptionArray()
      {
          return [
              [
                  'value' => \Fastly\Cdn\Model\Config::GEOIP_ACTION_DIALOG,
                  'label' => __('Dialog'),
              ],
              [
                  'value' => \Fastly\Cdn\Model\Config::GEOIP_ACTION_REDIRECT,
                  'label' => __('Redirect')
              ]
          ];
      }
docs: Options getter
  
  @return array