def vector(self) -> typing.Tuple[typing.Tuple[float, float], typing.Tuple[float, float]]:
        """Return the vector property in relative coordinates.

        Vector will be a tuple of tuples ((y_start, x_start), (y_end, x_end))."""
        ...
Return the vector property in relative coordinates.

        Vector will be a tuple of tuples ((y_start, x_start), (y_end, x_end)).