ConverterToDefaulting
@RequiresOptIn(message = "When creating an Arguments class, you must use one of the converter functions starting with `defaulting` instead. Otherwise, if you know what you're doing (or you're writing your own converter functions), please feel free to opt-in.
For example, instead of `boolean(...).toDefaulting()`, consider `defaultingBoolean(...)`.
Failure to register your converters this way may result in strange or broken behaviour.")
Opt-in annotation for .toDefaulting() converter functions.