code: public synchronized void putAll(Map<? extends String, ? extends XAttribute> t) {
  		try {
  			XAttributeMap map = deserialize();
  			map.putAll(t);
  			serialize(map);
  		} catch (IOException e) {
  			e.printStackTrace();
  		}
  	}
docs: /* (non-Javadoc)
  @see java.util.Map#putAll(java.util.Map)