ArrayList<Node> nodesWithMatchingTypes = new ArrayList<Node>();
            NodeIterator iterator = node.getNodes();
            final List<NodeTypeDefinition> nodeTypes = getWorkbenchDefinition().getNodeTypes();
            String currentNodeTypeName;
            while (iterator.hasNext()) {
                Node next = iterator.nextNode();
                currentNodeTypeName = next.getPrimaryNodeType().getName();
                for (NodeTypeDefinition current : nodeTypes) {
                    if (current.getName().equals(currentNodeTypeName)) {
                        nodesWithMatchingTypes.add(next);
                        break;
                    }
                }
            }

    /**
     * Adds an itemType to the list of existing types and associates an icon with it.
     * The type can be specified as a strict, in which case only the items of given type will be displayed, but sub types will be ignored,
     * or non-strict in which case the items of sub types of given type will also be rendered.
     * @param type The item type
     * @param icon The icon used to display items of given type
     * @param strict Flag specifying whether or not to show also items of sub type of given type
     */
    public void addItemType(String type, String icon, boolean strict) {
        this.itemTypes.add(type);
        if (icon != null) {
            setIcon(type, icon);
        }
        if (strict) {
            strictTypes.add(type);
        } else {
            strictTypes.remove(type);
        }
    }