print('>>> {} == {} ??: {}'.format(task, task_cls, task == task_cls))
      print('>>> {} issubclass {} ??: {}'.format(task, task_cls, issubclass(task, task_cls)))
      print('>>> {} issubclass {} ??: {}'.format(task_cls, task, issubclass(task_cls, task)))
      print('>>> {} is {} ??: {}'.format(task_cls, task, task_cls is task))
      print('>>> {} id(x) {} ??: {} {}'.format(task_cls, task, id(task_cls), id(task)))