public void render(Node parent) {
GridRow row = new GridRow();
row.add(new GridEntry("u-7-24", "left"));
row.add(new GridEntry("u-17-24", "right"));
row.render(y, parent);
Node leftPanel = row.getSource().one(".left"), rightPanel = row.getSource().one(".right");
editorPanel = rightPanel.appendChild("<div></div>");
y.newButton(ButtonConfig.create().label("Add new " + entityName).render(leftPanel).on("click", new EventCallback<ButtonEvent>() {