code: def get_work_item_type_category(self, project, category):
          
          route_values = {}
          if project is not None:
              route_values['project'] = self._serialize.url('project', project, 'str')
          if category is not None:
              route_values['category'] = self._serialize.url('category', category, 'str')
          response = self._send(http_method='GET',
                                location_id='9b9f5734-36c8-415e-ba67-f83b45c31408',
                                version='5.1-preview.2',
                                route_values=route_values)
          return self._deserialize('WorkItemTypeCategory', response)
docs: GetWorkItemTypeCategory.
          [Preview API] Get specific work item type category by name.
          :param str project: Project ID or project name
          :param str category: The category name
          :rtype: :class:`<WorkItemTypeCategory> <azure.devops.v5_1.work-item-tracking.models.WorkItemTypeCategory>`