def get_work_item_by_id(self, wi_id):
        '''
        Retrieves a single work item based off of the supplied ID

        :param wi_id: The work item ID number
        :return: Workitem or None
        '''
        work_items = self.get_work_items(id=wi_id)
        if work_items is not None:
            return work_items[0]
        return None
Retrieves a single work item based off of the supplied ID

        :param wi_id: The work item ID number
        :return: Workitem or None