init init_acastasexterncall (
		n_from_type: nullable AType,
		n_dot: nullable TDot,
		n_kwas: nullable TKwas,
		n_to_type: nullable AType
	)
	do
		_n_from_type = n_from_type.as(not null)
		n_from_type.parent = self
		_n_dot = n_dot
		if n_dot != null then n_dot.parent = self
		_n_kwas = n_kwas.as(not null)
		n_kwas.parent = self
		_n_to_type = n_to_type.as(not null)
		n_to_type.parent = self
	end