Trying to annotate with data classes with

@Immutable

and read this bit:

data

 classes that only contain 

val

 properties that do not have custom getters can safely be marked as Immutable if the types of properties are either primitive types or also Immutable:

And then looked at compose-samples

@Immutable
data class Episode(
    @PrimaryKey @ColumnInfo(name = "uri") val uri: String,
    @ColumnInfo(name = "podcast_uri") val podcastUri: String,
    @ColumnInfo(name = "title") val title: String,
    @ColumnInfo(name = "subtitle") val subtitle: String? = null,
    @ColumnInfo(name = "summary") val summary: String? = null,
    @ColumnInfo(name = "author") val author: String? = null,
    @ColumnInfo(name = "published") val published: OffsetDateTime,
    @ColumnInfo(name = "duration") val duration: Duration? = null
)

I have data classes with

Date

. Anyway it should still be safe to annotate as long as I’m sure it doesn’t get changed right? Also, I have states with single-time events:

data class Event<out T>(val content: T) {
    var consumed: Boolean = false
        private set

    fun consume(): T? =
        if (consumed) {
            null
        } else {
            consumed = true
            content
        }
}

I guess I can’t use `@Immutable`for such state classes…