code: def handle_unsubscribe(self, request, path):
          # type: (Subscribe, List[str]) -> CallbackResponses
          
          ret = []
          if path:
              # Recurse down
              name = path[0]
              child = self.children[name]
              ret += child.handle_unsubscribe(request, path[1:])
              if not child.children and not child.update_requests \
                      and not child.delta_requests:
                  del self.children[name]
          else:
              # This is for us
              if request in self.update_requests:
                  self.update_requests.remove(request)
              else:
                  self.delta_requests.remove(request)
              ret.append(request.return_response())
          return ret
docs: Remove from the notifier list and send a return
  
          Args:
              request (Subscribe): The original subscribe request
              path (list): The relative path from ourself
  
          Returns:
              list: [(callback, Response)] that need to be called