Source Generator not making optional attributes nullable in ReadOnly model

[Al12rs]

This can be seen in the NexusMods App code for Mod.cs model, specifically for the optional Version attribute:
https://github.com/Nexus-Mods/NexusMods.App/blob/727c0eecff6d2745b3e44557ee6e59f7e853a19d/src/Abstractions/NexusMods.Abstractions.Loadouts/Mods/Mod.cs#L44

The generated Version property of the ReadOnly model returns string rather than nullable string?.

           public string Version => NexusMods.Abstractions.Loadouts.Mods.Mod.Version.Get(this);

[erri120]

Implementation for optional attributes should probably be something like this:

return OptionalAttribute.TryGet(this, out var value) ? value : default;

[LukeNexusMods]

Effort = 3