code: public void setThisData(byte[] data)
      {
          try
          {
              pen.setData(data);
          }
          catch ( Exception e )
          {
              ThreadUtils.checkInterrupted(e);
              Throwables.propagate(e);
          }
      }
docs: Change the data stored in this instance's node
  
  @param data new data (cannot be null)