@Override public Item[] getItems(Graph graph) { // Workspace workspace = graphModel.getWorkspace(); PreviewProperties properties = Lookup.getDefault().lookup(PreviewController.class).getModel().getProperties(); if (properties.hasProperty("display-label.node.id")) { String nodeId = properties.getStringValue("display-label.node.id"); return new Item[]{new LabelItem(graph.getNode(nodeId))}; } else { return new Item[0]; } }