docs: def _adopt_notifications(self, state):
          '''Part of the "monitor" restart strategy. The pending notifications
          from descriptor of dead agent are imported to our pending list.'''
  
          def iterator():
              it = state.descriptor.pending_notifications.iteritems()
              for _, nots in it:
                  for x in nots:
                      yield x
  
          to_adopt = list(iterator())
          self.info("Will adopt %d pending notifications.", len(to_adopt))
          return state.sender.notify(to_adopt)