{"ast_node_type":"variable","tokens":[{"end":66,"kind":"keyword","start":0,"text":"let"}]}
        let ty_params = fn_args.types().map(|ty| format!("{ty}"));
        let ident = self.tcx.item_ident(fn_id);
        let const_params = fn_args.consts().map(|c| format!("{c}"));