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kotlinlang

Hello, is it possible by using kotlin's stdlib to apply `associateBy` on multiple level? Maybe not clear..
So I have something like
```
val list = listOf(listOf("value1", "value2", "value3"))
```
If I do use the method `associateBy`, I will get the fellowing output
```
println(list.associateBy { it[0] })
// {value1=[value1, value2, value3]}
```

And I would like something like:
```
{value1={value2=[value1, value2, value3]}}
```

Is it possible?