{"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"Lock<FxHashMap<ty::ParamEnv<'tcx>,"}]}
        Lock<FxHashMap<ty::ParamEnv<'tcx>, ty::CanonicalParamEnvCacheEntry<TyCtxt<'tcx>>>>,
    pub new_solver_canonical_param_env_cache: