{"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"TyKind::FnDef(fn_id,"}]}
            TyKind::FnDef(fn_id, subst) => {
        let (func, subst) = match callee.kind(Interner) {
                let callable = CallableDefId::from_chalk(self.db, *fn_id);