/**
  * @return string
  */
 protected function getEndpoint()
 {
     return parent::getEndpoint() . '/preauthorize';
 }
 /**
  * @return string
  */
 protected function getEndpoint()
 {
     return parent::getEndpoint() . '/invoiceCreated';
 }
 /**
  * @return string
  */
 protected function getEndpoint()
 {
     return parent::getEndpoint() . '/cancel';
 }