{"ast_node_type":"other","tokens":[{"end":9,"kind":"keyword","start":0,"text":"where"}]}
    where
    fn freshen_ty<F>(&mut self, input: Result<Ty<'tcx>, ty::InferTy>, mk_fresh: F) -> Ty<'tcx>
        F: FnOnce(u32) -> Ty<'tcx>,