@property
    def opposite(self):
        return OrderBy(self[1:]) if self.is_descending else OrderBy('-' + self)
Fails unless the given variable exists within the current scope.
dataset/ETHPy150Open bradleyayers/django-tables2/django_tables2/utils.py/OrderBy.opposite--crossover with--dataset/ETHPy150Open shellderp/sublime-robot-plugin/lib/robot/libraries/BuiltIn.py/_Variables.variable_should_exist