retain cycle?

[dennisfarandy]

 [source subscribeNext:^(id x) {
      if ([x isKindOfClass:[CEObservableMutableArray class]]) {
        ((CEObservableMutableArray *)x).delegate = self;
      }
      if (self->_data != nil && [self->_data isKindOfClass:[CEObservableMutableArray class]]) {
        ((CEObservableMutableArray *)self->_data).delegate = nil;
      }
      self->_data = x;
      [self->_tableView reloadData];
    }];

I just wondering is this make retain cycle? that why you dont need to set the Binding class into some public property right? since tableview.delegate is weak reference