async def retract(self, mount: top_types.Mount, margin: float):
        """ Pull the specified mount up to its home position.

        Works regardless of critical point or home status.
        """
        smoothie_ax = Axis.by_mount(mount).name.upper()
        async with self._motion_lock:
            smoothie_pos = self._backend.fast_home(smoothie_ax, margin)
            self._current_position = self._deck_from_smoothie(smoothie_pos)
Pull the specified mount up to its home position.

        Works regardless of critical point or home status.