{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"//"}]}
                        // We handle the ambig portions of `Ty` in the match arms below
                    (GenericParamDefKind::Type { .. }, GenericArg::Type(ty)) => {
                        self.cfcx.lower_ty(ty.as_unambig_ty()).raw.into()