class Test

	shared

		var _tookCar = 0
		var _tookBus = 0

		def main
			x as dynamic = Car()

			if x inherits Car
				.takeCar(x)

			if x inherits Bus
				.takeBus(x)

			assert _tookCar == 1
			assert _tookBus == 0


		def takeCar(c as Car)
			_tookCar += 1

		def takeBus(b as Bus)
			_tookBus += 1


class Car
	pass

class Bus
	pass