@Test
public void testAddChild() {

  LayoutModel layout = new LayoutModelImpl("Layout", parent, "List");
  String path = "/Shuffleboard/Tab/Foo";
  ComponentModel child = new WidgetModelImpl(path, layout, () -> null, "", Collections.emptyMap());
  layout.addChild(child);
  assertSame(child, layout.getChild(path));
}