doubleArray
fun NonNullSavedStateHandleKey.Companion.doubleArray(key: String, defaultValue: DoubleArray): NonNullSavedStateHandleKey<DoubleArray>
fun NullableSavedStateHandleKey.Companion.doubleArray(key: String, defaultValue: DoubleArray? = null): NullableSavedStateHandleKey<DoubleArray>