docs: public void marshall(ActivateGatewayRequest activateGatewayRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (activateGatewayRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(activateGatewayRequest.getActivationKey(), ACTIVATIONKEY_BINDING);
              protocolMarshaller.marshall(activateGatewayRequest.getGatewayName(), GATEWAYNAME_BINDING);
              protocolMarshaller.marshall(activateGatewayRequest.getGatewayTimezone(), GATEWAYTIMEZONE_BINDING);
              protocolMarshaller.marshall(activateGatewayRequest.getGatewayRegion(), GATEWAYREGION_BINDING);
              protocolMarshaller.marshall(activateGatewayRequest.getGatewayType(), GATEWAYTYPE_BINDING);
              protocolMarshaller.marshall(activateGatewayRequest.getTapeDriveType(), TAPEDRIVETYPE_BINDING);
              protocolMarshaller.marshall(activateGatewayRequest.getMediumChangerType(), MEDIUMCHANGERTYPE_BINDING);
              protocolMarshaller.marshall(activateGatewayRequest.getTags(), TAGS_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }