{"ast_node_type":"variable","tokens":[{"end":61,"kind":"keyword","start":0,"text":"let"}]}
        let snapshot = self.create_snapshot_for_diagnostic();
    fn recover_const_param_decl(&mut self, ty_generics: Option<&Generics>) -> Option<GenericArg> {
        let param = match self.parse_const_param(AttrVec::new()) {