in src/main/java/org/apache/cayenne/modeler/utility/TreeViewUtilities.java [46:58]
public static TreeItem<Object> addNode(final TreeItem<Object> item, final TreeItem<Object> parent, final boolean expanded, final GlyphIcons icon)
{
// TreeItem<String> item = new TreeItem<String>(title);
item.setExpanded(expanded);
if (icon != null)
item.setGraphic(GlyphsDude.createIcon(icon, TREE_ICON_SIZE));
parent.getChildren().add(item);
return item;
}