code: public void serialize(XAttributeMap map, DataOutput out) throws IOException {
  		serialize(map.values(), out);
  	}
docs: /*
  (non-Javadoc)
  
  @see
  org.deckfour.xes.model.buffered.XAttributeMapSerializer#serialize(org
  .deckfour.xes.model.XAttributeMap, java.io.DataOutput)