init init_arangeexpr (
		n_expr: nullable AExpr,
		n_expr2: nullable AExpr,
		n_annotations: nullable AAnnotations
	)
	do
		_n_expr = n_expr.as(not null)
		n_expr.parent = self
		_n_expr2 = n_expr2.as(not null)
		n_expr2.parent = self
		_n_annotations = n_annotations
		if n_annotations != null then n_annotations.parent = self
	end