code: protected function executeMethodOnSoapClientForMsg($msgName, $method)
      {
          $result = null;
          $soapClient = $this->getSoapClient($msgName);
  
          if ($soapClient instanceof \SoapClient) {
              $result = $soapClient->$method();
          }
  
          return $result;
      }
docs: Execute a method on the native SoapClient
  
  @param string $msgName
  @param string $method
  @return null|string