public byte[] toBytes(){
  try {
    ByteArrayOutputStream out=new ByteArrayOutputStream();
    _field.store(out,null);
    return out.toByteArray();
  }
 catch (  IOException e) {
    throw new IllegalStateException(e);
  }
}

public byte [ ] toBytes ( ) { try { ByteArrayOutputStream out = new ByteArrayOutputStream ( ) ; _field . store ( out , null ) ; return out . toByteArray ( ) ; } catch ( IOException e ) { throw new IllegalStateException ( e ) ; } }
serializes this nested object into byte [ ]
