code: public void marshall(PlacementDescription placementDescription, ProtocolMarshaller protocolMarshaller) {
  
          if (placementDescription == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(placementDescription.getProjectName(), PROJECTNAME_BINDING);
              protocolMarshaller.marshall(placementDescription.getPlacementName(), PLACEMENTNAME_BINDING);
              protocolMarshaller.marshall(placementDescription.getAttributes(), ATTRIBUTES_BINDING);
              protocolMarshaller.marshall(placementDescription.getCreatedDate(), CREATEDDATE_BINDING);
              protocolMarshaller.marshall(placementDescription.getUpdatedDate(), UPDATEDDATE_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.