I think that because this is a library intended to be included into any plugin/theme, it should not have any `@since` in the codebase. Right now, I see some templates or obsolete mentions of `@since` from EDD: https://github.com/search?q=repo%3Aawesomemotive%2Fedd-sl-sdk%20%40since%20&type=code (or [here](https://github.com/awesomemotive/edd-sl-sdk/blob/main/src/Updaters/Plugin.php#L264))