init init_aabstractclasskind (
		n_kwabstract: nullable TKwabstract,
		n_kwclass: nullable TKwclass
	)
	do
		_n_kwabstract = n_kwabstract.as(not null)
		n_kwabstract.parent = self
		_n_kwclass = n_kwclass.as(not null)
		n_kwclass.parent = self
	end