class A

	pro b from var as Object?


class P

	def main
		a = A()
		assert a.b is nil
		
		a = A(b=5)
		assert a.b == 5

		a = A(b=String)
		assert a.b is String

		a = A(b=List<of String>)  # reference a generic type in a keyword argument
		assert a.b is List<of String>