syntax_data: {"ast_node_type":"variable","tokens":[{"end":48,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let ty = self.infcx.shallow_resolve(ty);
context_before:     fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx> {
context_after:         match *ty.kind() {