code: def get_content_id(self, content_metadata_item):
          
          content_id = content_metadata_item.get('key', '')
          if content_metadata_item['content_type'] == 'program':
              content_id = content_metadata_item.get('uuid', '')
          return content_id
docs: Return the id for the given content_metadata_item, `uuid` for programs or `key` for other content