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kotlinlang

Hi everyone, I'm unable to fix a compilation problem on the TableSelectView article (<https://edvin.town/leveraging-tornadofx-to-the-fullest/>)
All calls to `column(...)` below cause this error:
`None of the following functions can be called with the arguments supplied.`
```
 override val root = vbox(10.0) {
        tableview(items) {
            column("SKU", Item::sku) 
            column("Item", Item::descr)
            column("Price", Item::price)
            column("Taxable", Item::taxable)
            bindSelected(mySelectedItem)
            setPrefSize(667.0, 376.0)
            columnResizePolicy = CONSTRAINED_RESIZE_POLICY
            vgrow = Priority.ALWAYS
        }
```

I think it expects to work with properties now, so an `Item` class like this would work:
```
data class Item(val sku : StringProperty,
                val descr : StringProperty,
                val price : FloatProperty,
                val taxable : BooleanProperty)
```

<https://edvin.town/tornadofx-advanced-tableview-editing/> looks to be more up to date