ConvertWith
annotation class ConvertWith(val use: KClass<out MapTypeConverter<*, *>> = MapTypeConverter::class, val onFail: OnFail = OnFail.Auto)
Per-field OVERRIDE of converter resolution and/or brokenness policy (both directions). Never required for discovery — built-ins and @KMapperConfig converters are pair-discovered. use left at its sentinel default means "keep the auto-discovered converter".