docs: public void marshall(Region region, ProtocolMarshaller protocolMarshaller) {
  
          if (region == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(region.getContinentCode(), CONTINENTCODE_BINDING);
              protocolMarshaller.marshall(region.getDescription(), DESCRIPTION_BINDING);
              protocolMarshaller.marshall(region.getDisplayName(), DISPLAYNAME_BINDING);
              protocolMarshaller.marshall(region.getName(), NAME_BINDING);
              protocolMarshaller.marshall(region.getAvailabilityZones(), AVAILABILITYZONES_BINDING);
              protocolMarshaller.marshall(region.getRelationalDatabaseAvailabilityZones(), RELATIONALDATABASEAVAILABILITYZONES_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }