Implementation of :py:func:`pynspect.traversers.RuleTreeTraverser.unary_operation` interface.

def unary_operation(self, rule, right, **kwargs):
        """
        Implementation of :py:func:`pynspect.traversers.RuleTreeTraverser.unary_operation` interface.
        """
        return self.evaluate_unop(rule.operation, right, **kwargs)