init init_ainitexpr (
		n_expr: nullable AExpr,
		n_kwinit: nullable TKwinit,
		n_args: nullable AExprs
	)
	do
		_n_expr = n_expr.as(not null)
		n_expr.parent = self
		_n_kwinit = n_kwinit.as(not null)
		n_kwinit.parent = self
		_n_args = n_args.as(not null)
		n_args.parent = self
	end