class_docstr: Base class for any filter to activate/deactivate a feature, depending on a
  condition.
  
  The return value of ``__call__`` will tell if the feature should be active.
class_docstr_tok: ["Base","class","for","any","filter","to","activate\/deactivate","a","feature",",","depending","on","a","condition",".","The","return","value","of","``","__call__","``","will","tell","if","the","feature","should","be","active","."]
docstr: Inverting of filters using the ~ operator.
code: def __invert__(self) -> Filter:
      """
      Inverting of filters using the ~ operator.
      """
      if self._invert_result is None:
          self._invert_result = _Invert(self)
  
      return self._invert_result
  
imports: from __future__ import annotations
  from abc import ABCMeta, abstractmethod
  from typing import Callable, Iterable, Union
label_desc: Use image node_id 5 for calling the Filter obj's underlying member method code with example usage: obj.__invert__() and returns: self