{"ast_node_type":"variable","tokens":[{"end":65,"kind":"keyword","start":0,"text":"let"}]}
        let Some(&Id(target)) = self.by_name.get(new_name) else {
    pub fn register_renamed(&mut self, old_name: &str, new_name: &str) {
            bug!("invalid lint renaming of {} to {}", old_name, new_name);