{"ast_node_type":"variable","tokens":[{"end":60,"kind":"keyword","start":0,"text":"let"}]}
        let struct_path = self.tcx().def_path_str(base_did);
    fn private_field_err(&self, field: Ident, base_did: DefId) -> Diag<'_> {
        let kind_name = self.tcx().def_descr(base_did);