--- contrib/libs/fmt/include/fmt/format.h	(index)
+++ contrib/libs/fmt/include/fmt/format.h	(working tree)
@@ -3087,6 +3087,13 @@ FMT_INLINE auto format_to(OutputIt out, const Locale& loc,
   return vformat_to(out, loc, fmt, fmt::make_format_args(args...));
 }
 
+// TODO(dakovalkov): Remove after updating fmtlib to newer version.
+// https://github.com/fmtlib/fmt/blob/6e6eb63770a8f69bba48d079fb0f43f036d6b543/include/fmt/format.h#L4269
+template <typename Enum>
+constexpr auto underlying(Enum e) noexcept {
+    return static_cast<std::underlying_type_t<Enum>>(e);
+}
+
 FMT_MODULE_EXPORT_END
 FMT_END_NAMESPACE