val ContainerSaver = listSaver<Container?, Any?>(
    save = {
        if(it != null) {
            listOf(it.name) + it.items.map {
                it.id
            }
        } else {
            emptyList()
        }
    },
    restore = {
        if(it.isNotEmpty()) {
            Container(it[0] as String,
                it.drop(1).map {
                    Item(it as Int)
                }
            )
        } else {
            null
        }
    }
)

save = {
    listOf(
"name",
listOf(1,2,3)
}