import java.util.List;
import org.simantics.g2d.element.ElementClass;
+import org.simantics.g2d.element.ElementHints;
import org.simantics.g2d.element.ElementUtils;
import org.simantics.g2d.element.IElement;
import org.simantics.g2d.element.SceneGraphNodeKey;
SingleElementNode holder = node.getOrCreateNode(ElementUtils.generateNodeId(e), SingleElementNode.class);
//SingleElementNode holder = parent.getOrCreateNode(ElementUtils.generateNodeId(e), SingleElementNode.class);
holder.setZIndex(++zIndex);
+ holder.setKey(e.getHint(ElementHints.KEY_OBJECT));
List<SceneGraph> nodeHandlers = ec.getItemsByClass(SceneGraph.class);
for(SceneGraph n : nodeHandlers) {