And why won't this compile either? ``` class Foo(val bars: Map<Int, Bar<*>>) { ...

# getting-started

[benleggiero]

And why won't this compile either?

class Foo(val bars: Map<Int, Bar<*>>) {
    
    fun <Baz> qux(baz: Baz) {
        val bar2 = bars[2]!!
        bar2.bazes += baz
    }
    
    interface Bar<Baz> {
        var bazes: MutableList<Baz>
    }
}

[karelpeeters]

Read this: https://kotlinlang.org/docs/reference/generics.html#type-projections

[benleggiero]

Thanks! I'm still not used to there being useful existing knowledge about Kotlin compiler errors :P