class_docstr: Never enable feature.
code: def __invert__(self):
      return Always()
  
imports: from __future__ import unicode_literals
  from abc import ABCMeta, abstractmethod
  from six import with_metaclass
  from prompt_toolkit.utils import test_callable_args
label_desc: Use image node_id 2 for calling the Never obj's underlying member method code with example usage: obj.__invert__() and returns: Always