this.add(new ArtifactTreeNode(localIterator.next())) ;
this.add(new ArtifactTreeNode(localIterator.next(), treeModel)) ;
	public WorkProductDescriptorTreeNode (WorkProductDescriptor _product)	{		super() ;		this.product = _product ;		this.setUserObject(product.getName()) ;		this.product.addObserver(this) ;		// Adding artifacts to this node		Iterator <Artifact> localIterator = product.getArtifacts().iterator() ;		while (localIterator.hasNext())		{			this.add(new ArtifactTreeNode(localIterator.next())) ;		}	}