Can Scala reflection get you the list of type aliases defined in a class?

The situation I'm facing is one where I need to instantiate a class by name, but that class is actually a scala type alias defined in an object (a package object actually). I have figured out many piece of what I need for this, but I can't find a way to introspect the object to get the type aliases.

Specifically, I have the string "Foo.MyString" and I want to instantiate an instance of that based on the following definition.

object Foo {
   type MyString = String
}

I can use runtimeMirror.staticModule to get the symbol, and then runtimeMirror.reflectModule, but I can't find any way to then resolve the type alias name of "MyString".

To get the methods or fields of Foo I can drop down to Java introspection with module.instance.getClass, but Java obviously doesn't have a way to get the type aliases.

I've also tried using Symbols, but that just let's you get the owner of a symbol, not the 'owned' symbol.