import laylight
class FooDevice(laylight.structure.AbstractDevice):
    def input(self):
        return []

    def output(self):
        return []

    def impl_klayout(
        self,
    ):
        cell = self.layout.create_cell("A")

        straight = laylight.structure.wg.WGStraight(layout=self.layout, length=100, slab_enable=True)
        arc = laylight.structure.curve.ArcCurve(layout=self.layout, degree=180, width=0.5, radius=50)
        sp = laylight.structure.spiral.SpiralDelay(layout=self.layout)
        rp = laylight.structure.racetrack.RacetrackCoupled(layout=self.layout)

        dev = (
            laylight.placable.Placer()
            .then(arc)
            .then(straight)
            .then(rp)
            .then(straight)
            .then(arc)
            .as_dev(layout=self.layout, name="foo")
        )

        laylight.placable.Placer().then(dev).rotate(0).into(cell)

        return cell


top = FooDevice(layout=layout,tech=tech)