@Override
  public void setEnabled(final boolean enabled) {
    if (mainComposite == null) {
      return;
    }

    optimalizationLevel.setEnabled(enabled, mainComposite);
    otherFlags.setEnabled(enabled, mainComposite);
  }
  @Override
  public void performDefaults() {
    if (mainComposite == null) {
      return;
    }

    optimalizationLevel.setEnabled(true, mainComposite);
    optimalizationLevel.setSelectedValue("Common optimizations");

    otherFlags.setEnabled(true, mainComposite);
    otherFlags.setStringValue("");
  }