code: function(err)
    {
      // we're done loading
      self._isLoading = false;
  
      // emit an event to notify subscribers
      self.emit('loadcomplete', err, self);
  
      // invoke the callback if one was specified
      if (Util.isFunction(callback))
      {
        callback(err, self);
      }
    }
docs: Completes the chunk load.
  
  @param err