private TBItemButton _setFlag(int nstLibFlag, boolean val) {
    final int flags = _applyFlag(myFlags, val, nstLibFlag);
    if (flags != myFlags) {
      myFlags = flags;
      updateOptions |= NSTLibrary.BUTTON_UPDATE_FLAGS;
    }
    return this;
  }
private TBItemButton _setFlag(int nstLibFlag, boolean val)