@Override
  public void save(DataOutput out) {
    super.save(out);
    try {
      DataInputOutputUtil.writeINT(out, myVersion);
      RW.save(myRequires, out);
      RW.save(myExports, out);
    }
    catch (IOException e) {
      throw new BuildDataCorruptedException(e);
    }
  }
@Override
  public void save(DataOutput out)