{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"before_feature_tys:"}]}
                    before_feature_tys: Ty::new_tup(self.tcx, &before_feature_tys),
                ClosureSizeProfileData {
                    after_feature_tys: Ty::new_tup(self.tcx, &after_feature_tys),