code: def ancestor(self):
          
          ancestors = getattr(self.parsed_response, 'Ancestors', None)
          if hasattr(ancestors, 'BrowseNode'):
              return AmazonBrowseNode(ancestors['BrowseNode'])
          return None
docs: This browse node's immediate ancestor in the browse node tree.
  
          :return:
              The ancestor as an :class:`~.AmazonBrowseNode`, or None.