Runs the ``callback`` after ``delay`` seconds have passed.

        Returns an opaque handle that may be passed to `remove_timeout`
        to cancel.  Note that unlike the `asyncio` method of the same
        name, the returned object does not have a ``cancel()`` method.

        See `add_timeout` for comments on thread-safety and subclassing.

        .. versionadded:: 4.0

def call_later(
        self, delay: float, callback: Callable[..., None], *args: Any, **kwargs: Any
    ) -> object:
        """Runs the ``callback`` after ``delay`` seconds have passed.

        Returns an opaque handle that may be passed to `remove_timeout`
        to cancel.  Note that unlike the `asyncio` method of the same
        name, the returned object does not have a ``cancel()`` method.

        See `add_timeout` for comments on thread-safety and subclassing.

        .. versionadded:: 4.0
        """
        return self.call_at(self.time() + delay, callback, *args, **kwargs)