Fun fact - if you don’t like Java erasing types by default, you can just pass them along manually yourself.

There’s a bunch of ways to do this, but I’ll just leave this one trick here.

Instead of:

    List<Integer> x = new ArrayList<Integer>();

write this:

    List<Integer> x = new ArrayList<Integer>(){};

Now you’ll be able to ask at runtime and determine it is a subclass of List<Integer>.