docs: public void marshall(CreateDirectConnectGatewayAssociationProposalRequest createDirectConnectGatewayAssociationProposalRequest,
              ProtocolMarshaller protocolMarshaller) {
  
          if (createDirectConnectGatewayAssociationProposalRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(createDirectConnectGatewayAssociationProposalRequest.getDirectConnectGatewayId(), DIRECTCONNECTGATEWAYID_BINDING);
              protocolMarshaller.marshall(createDirectConnectGatewayAssociationProposalRequest.getDirectConnectGatewayOwnerAccount(),
                      DIRECTCONNECTGATEWAYOWNERACCOUNT_BINDING);
              protocolMarshaller.marshall(createDirectConnectGatewayAssociationProposalRequest.getGatewayId(), GATEWAYID_BINDING);
              protocolMarshaller.marshall(createDirectConnectGatewayAssociationProposalRequest.getAddAllowedPrefixesToDirectConnectGateway(),
                      ADDALLOWEDPREFIXESTODIRECTCONNECTGATEWAY_BINDING);
              protocolMarshaller.marshall(createDirectConnectGatewayAssociationProposalRequest.getRemoveAllowedPrefixesToDirectConnectGateway(),
                      REMOVEALLOWEDPREFIXESTODIRECTCONNECTGATEWAY_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }