container.refresh();
MultiFieldInfo multiField = (MultiFieldInfo) container.getWidgets().get(0);
FlowContainer flowContainer = new FlowContainerFactory(multiField, false).get().get(0);
// add new LabelField
FieldInfo newField = createJavaInfo("com.extjs.gxt.ui.client.widget.form.LabelField", "empty");
assertTrue(flowContainer.validateComponent(newField));
flowContainer.command_CREATE(newField, null);
assertEditor(
"public class Test extends LayoutContainer {",
" public Test() {",
" setLayout(new FormLayout());",