{"ast_node_type":"variable","tokens":[{"end":56,"kind":"keyword","start":0,"text":"let"}]}
        let used = self.rwu_table.get_used(writer, var);
    fn define(&mut self, writer: LiveNode, var: Variable) {
        self.rwu_table.set(writer, var, rwu_table::RWU { reader: false, writer: false, used });