mixin A

	def one as int
		return 1
	
	def two as int is protected
		return 2

	def three as int is private
		return 3


class B adds A

	def foo
		assert .one == 1
		assert .two == 2
		assert .three == 3


class P

	def main
		b = B()
		b.foo
		b.one
		b.two    # .error. cannot access protected
		b.three  # .error. cannot access private