code: public function build(SoapClientBuilderInterface $builder)
      {
          $builder->createWsdl($this->endpoint);
          $builder->createSoapClient();
          $builder->setLogin($this->login);
          $builder->setMode($this->mode);
          $builder->setClientVersion(self::CLIENT_VERSION);
  
          return $builder->getSoapClient();
      }
docs: Build the the SOAP client.
  
  @param SoapClientBuilderInterface $builder
  
  @return SoapClient