* https://github.com/martinmoene/optional-lite[optional lite]
* https://github.com/martinmoene/span-lite[span lite]
* https://github.com/martinmoene/string-view-lite[string_view lite]
+* https://github.com/quicknir/wise_enum[wise_enum]
* https://github.com/wonder-mice/zf_log[zf_log]
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