ran = true;
      throw new RuntimeException(id);
    }
  }

  private static final class SimpleTearDown implements TearDown {

    boolean ran = false;
    @Nullable Callback callback = null;

    public SimpleTearDown() {}

    public SimpleTearDown(Callback callback) {
      this.callback = callback;
    }

    @Override
    public void tearDown() throws Exception {

      ran = true;
      throw new RuntimeException(id);
    }
  }

  private static final class SimpleTearDown implements TearDown {

    boolean ran = false;
    @Nullable Callback callback = null;

    public SimpleTearDown() {}

    public SimpleTearDown(Callback callback) {
      this.callback = callback;
    }

    @Override
    public void tearDown() throws Exception {