{"ast_node_type":"variable","tokens":[{"end":51,"kind":"keyword","start":0,"text":"let"}]}
        let t = lang_item(db, start_crate, *self)?;
    pub fn ty_rel_path(&self, db: &dyn DefDatabase, start_crate: Crate, seg: Name) -> Option<Path> {
        Some(Path::LangItem(t, Some(seg)))