docs: public void marshall(DescribeDirectConnectGatewayAttachmentsRequest describeDirectConnectGatewayAttachmentsRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (describeDirectConnectGatewayAttachmentsRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(describeDirectConnectGatewayAttachmentsRequest.getDirectConnectGatewayId(), DIRECTCONNECTGATEWAYID_BINDING);
              protocolMarshaller.marshall(describeDirectConnectGatewayAttachmentsRequest.getVirtualInterfaceId(), VIRTUALINTERFACEID_BINDING);
              protocolMarshaller.marshall(describeDirectConnectGatewayAttachmentsRequest.getMaxResults(), MAXRESULTS_BINDING);
              protocolMarshaller.marshall(describeDirectConnectGatewayAttachmentsRequest.getNextToken(), NEXTTOKEN_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }