(self, formula, args, **kwargs)
return None
Returns None, independently from the children's value.
Returns None, independently from the children's value.
Returns None independently from the children s value .
def walk_none(self, formula, args, **kwargs):
        #pylint: disable=unused-argument
        """ Returns None, independently from the children's value."""
        return None
def walk_none ( self , formula , args , * * kwargs ) : #pylint: disable=unused-argument return None