class_docstr: Filter to activate/deactivate a feature, depending on a condition.
  The return value of ``__call__`` will tell if the feature should be active.
docstr: Test whether this filter can be called with the following argument list.
docstr_tok: ["Test","whether","this","filter","can","be","called","with","the","following","argument","list","."]
code: def test_args(self, *args):
      """
      Test whether this filter can be called with the following argument list.
      """
      return test_callable_args(self.__call__, args)
  
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 6 for calling the Filter obj's underlying member method code with example usage: obj.test_args() and returns: test_callable_args