def interlayer_connector(
self,
l0: tuple[list[int], int],
l1: tuple[list[int], int],
cs: CoordinateSystem,
layer_bounds: dict[str, tuple[float, float]],
) -> tuple[
list[tuple[int, _InterlayerConnectorProtocol]],
list[tuple[int, _InterlayerConnectorProtocol]],
]: ...