{"ast_node_type":"variable","tokens":[{"end":78,"kind":"keyword","start":0,"text":"let"}]}
            let ident = Ident::new(kw::DollarCrate, DUMMY_SP.with_ctxt(ctxt));
        hygiene::update_dollar_crate_names(|ctxt| {
            match self.resolve_crate_root(ident).kind {