List-backed property of a list-backed property

I've been wondering this for a while but is it possible to index an list inside of a list? ie. You can have a 1 layer list-backed property via public void setFoo(int key, Object value) { foo.set(key, value); } public Object getFoo(int key) { return foo.get(key); } a

A list-backed property...of a list-backed property?

I've been wondering this for a while but is it possible to index an list inside of a list? ie. You can have a 1 layer list-backed property via public void setFoo(int key, Object value) { foo.set(key, value); } public Object getFoo(int key) { return foo.get(key); } a