{"ast_node_type":"variable","tokens":[{"end":43,"kind":"keyword","start":0,"text":"let"}]}
        let cstore = CStore::from_tcx(tcx);
    providers.hooks.expn_hash_to_expn_id = |tcx, cnum, index_guess, hash| {
        cstore.get_crate_data(cnum).expn_hash_to_expn_id(tcx.sess, index_guess, hash)