class Top

	cue init(i as int)
		base.init

	def foo(i as int) as int
		return i*2


class Bottom inherits Top

	cue init(i as int)
		base.init(i)

	def foo(i as int) as int is new
		return base.foo(i)

	def main is shared
		b as Bottom = Bottom(0)
		assert b.foo(3)==6