@Override
    public MenuBarTabHandler insert(int index, MenuItemFactory factory) {
        factories.add(index, injector.inject(factory));
        return this;
    }
Default implementation of {@link MenuBarTabHandler}.

@author Emil Forslund
@since  3.1.5
tool-parent/tool-core/src/main/java/com/speedment/tool/core/internal/menubar/MenuBarTabHandlerImpl.java