import java.util.List;
public class OldRawAPI {
    public void set(List arg) { } // OK to warn in 1.5 code
    public List get() { return null; } // OK to warn in 1.5 code
}

import java.util.ArrayList;
import java.util.List;
public class Sub extends OldRawAPI {
    @Override
    public void set(List arg) { // overrides method with raw argument type
        super.set(arg);
        arg.set(0, "A"); // 'arg' is forced to be raw
    }
    <T> void process (OldRawAPI thing) {
        thing.get().add("x"); // get() returns a raw List
        
        List<String> strings= thing.get(); // unchecked conversion from raw List
        ArrayList<String> al= (ArrayList<String>) thing.get(); // unchecked cast
    }
}