/**
  * Returns all rows from civicrm_paytrail_payment_processor_config table.
  * Listens URL civicrm/paytrail/settings/ajax/getConfig.
  */
 public static function getConfig()
 {
     $configHelper = new CRM_Paytrail_ConfigHelper();
     echo json_encode(array_merge($configHelper->getDefaultValues(), $configHelper->getAllDatabaseConfigs()));
     CRM_Utils_System::civiExit();
 }