System.out.println("adding " + other.getLength());
	public void addAll(Sequence other) throws XPathException {		if(other.getLength() > 0) {			Item next;			for(SequenceIterator i = other.iterate(); i.hasNext(); ) {				next = i.nextItem();				if(next != null)					add(next);			}		} else if(other.getLength() == 1)			add(other.itemAt(0));	}