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kotlinlang

If I have a generic type with 2 type parameters, for example:
```
   data class TableColumn&lt;T,U&gt;(val rawColumn: T, val transformer: (U) -&gt;T)
```
Is it possible to add a secondary constructor that forces both type parameters to be the same?  something like:
```
   data class TableColumn&lt;T,U&gt;(val rawColumn: T, val transformer: (U) -&gt;T) {
         constructor(rawColumn: &lt;**U==T**&gt;): this(rawColumn, { it })
   }
```
basically I want to be able to create a `TableColumn&lt;T,T&gt;` instance by only specifying a single T instance and have the transformer "automatically" do an identity transform.