+ ".");
      return;
    }
    fail();
  }

  public static final class BadNullsFactory {
    public static Object bad(@SuppressWarnings("unused") String a) {
      return new BadNulls();
    }

    private BadNullsFactory() {}
  }

  @AndroidIncompatible // TODO(cpovirk): ClassNotFoundException... ClassSanityTesterTest$AnInterface