Please kindly let me know how to add a custom attribute to a Work item type by using Plain Java API.

I have added some custom attributes to a project area by using the following code.

IWorkItemClient workItemClient = (IWorkItemClient) teamRepository.getClientLibrary(IWorkItemClient.class);

IProcessItemService processService = (IProcessItemService) teamRepository.getClientLibrary(IProcessItemService.class);

URI uri = URI.create(projectName.replaceAll(" ", "%20"));

IProjectArea projectArea = (IProjectArea) processService.findProcessArea(uri, null, monitor);

if (projectArea == null) {

throw new InvalidArgumentException("Project area not found.");

}

IProjectArea projectAreaCopy = (IProjectArea) processService.getMutableCopy(projectArea);

        // Specify the work item type ID and the custom attribute details

        String workItemTypeId = WorkItemTypes.TASK;

        String customAttributeId = "customattribute2";

        String customAttributeDisplayName = "CustomAttribute2";

        String customAttributeType = AttributeTypes.SMALL_STRING; 

        

        IAttribute customAttribute = workItemClient.createAttribute(projectAreaCopy, customAttributeId, customAttributeType,customAttributeDisplayName, monitor);