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kotlinlang

Does Spring Data `2021.0.1` support Kotlin `1.5`?  The docs at <https://docs.spring.io/spring-data/mongodb/docs/3.2.1/reference/html/#kotlin.requirements> say `Spring Data supports Kotlin 1.3...`

I seem to be hitting an issue when reading an immutable `data class`  from Mongo due to the presence of the final parameter of the constructor being of type `kotlin.jvm.internal.DefaultConstructorMarker`:  I get an exception `org.springframework.data.mapping.MappingException: Parameter org.springframework.data.mapping.PreferredConstructor$Parameter@80a6e44c does not have a name!`.  The parameter in question is, indeed, the `DefaultConstructorMarker`.  I'm using Spring Data MongoDB `3.2.1`  w/commons `2.5.1`.

Offending `data class` is :
```sealed interface Availability {
    companion object {
        val CONVENTIONAL_8TO5_WITH_LUNCH_RECURRENCE: CronString = "0/30 8-12,13-17 * * MON-FRI"
        val CONVENTIONAL_8TO5_RECURRENCE: CronString = "0/30 8-17 * * MON-FRI"
        val CONVENTIONAL_9TO5_WITH_LUNCH_RECURRENCE: CronString = "0/30 9-12,13-17 * * MON-FRI"
        val CONVENTIONAL_9TO5_RECURRENCE: CronString = "0/30 9-17 * * MON-FRI"

        val DEFAULT_RECURRENCE = CONVENTIONAL_9TO5_WITH_LUNCH_RECURRENCE
        val DEFAULT_SLOT_MINUTES = 30U.toUByte()
        val DEFAULT_ALLOWED_BOOKING_COUNT = 1U.toUByte()
    }

    val handle: String
    val slotMinutes: UByte
    val allowedBookingCount: UByte
    val name: String?
    val effectivity: Interval?
}

data class RecurringAvailability(
    val recurrence: CronString = DEFAULT_RECURRENCE,
    override val handle: String = UUID.randomUUID().toString(),
    override val slotMinutes: UByte = DEFAULT_SLOT_MINUTES,
    override val allowedBookingCount: UByte = DEFAULT_ALLOWED_BOOKING_COUNT,
    override val effectivity: Interval? = null,
    override val name: String? = null,
) : Availability```
(fyi, `CronString` is `typealias CronString = String`)

Figured it out.  I was using Kotlin unsigned byte types, which leverage inline classes.  Bug that I hit was <https://github.com/spring-projects/spring-data-commons/issues/1947>.  Also relevant was <https://github.com/spring-projects/spring-data-commons/issues/2215#issuecomment-752410346>