* @param tags
* @param deepCopy
* @return cloned map
*/
private HashMap<String,TagLibTag> duplicate(HashMap<String,TagLibTag> tags, boolean deepCopy) {
if(deepCopy) throw new PageRuntimeException(new ExpressionException("deep copy not supported"));
Iterator<Entry<String, TagLibTag>> it = tags.entrySet().iterator();
HashMap<String,TagLibTag> cm = new HashMap<String,TagLibTag>();
Entry<String, TagLibTag> entry;
while(it.hasNext()){