A modern programming language that makes developers happier.

kotlinlang

I've created an interface for the two that I have and I can't define the interface as sealed

Interfaces cannot be sealed due to JVM constrains. You need an abstract base class that you seal.

I can't have abstract classes for data classes, correct?

But data classes cannot be inherited from, period.

But you can do this:
```
sealed class Sealed {
    data class OptionA(val foo: String) : Sealed()
    data class OptionB(val foo: Int) : Sealed()
}
```

then use Sealed as type name for OptionA/OptionB?

ah right, that would require me to do match clauses based on the classes listed