How to use the testslide.mock_callable._RaiseRunner function in TestSlide

def __init__(self, target, method, original_callable, exception):
        super(_RaiseRunner, self).__init__(target, method, original_callable)
        self.exception = exception

def to_raise(self, ex):
        """
        Raises given exception class or exception instance.
        """
        if isinstance(ex, BaseException):
            self._add_runner(
                _RaiseRunner(
                    self._original_target, self._method, self._original_callable, ex
                )
            )
        elif isinstance(ex(), BaseException):
            self._add_runner(
                _RaiseRunner(
                    self._original_target, self._method, self._original_callable, ex()
                )
            )
        else:
            raise ValueError(
                "{} is not subclass or instance of BaseException".format(ex)
            )
        return self

def to_raise(self, ex):
        """
        Raises given exception class or exception instance.
        """
        if isinstance(ex, BaseException):
            self._add_runner(
                _RaiseRunner(
                    self._original_target, self._method, self._original_callable, ex
                )
            )
        elif isinstance(ex(), BaseException):
            self._add_runner(
                _RaiseRunner(
                    self._original_target, self._method, self._original_callable, ex()
                )
            )
        else:
            raise ValueError(
                "{} is not subclass or instance of BaseException".format(ex)
            )
        return self