{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"FnRetTy::Ty(ty)"}]}
            FnRetTy::Ty(ty) if matches!(itctx, ImplTraitContext::OpaqueTy { .. }) => {
            // ```
                if self.tcx.features().impl_trait_in_fn_trait_return() {