{"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"require_c_abi_if_c_variadic(tcx,"}]}
                require_c_abi_if_c_variadic(tcx, bf.decl, bf.abi, hir_ty.span);
            hir::TyKind::FnPtr(bf) => {