Interface defining a factory for creating components that correspond to items in a side bar section. When the item is clicked by the user, {@link org.vaadin.spring.stuff.sidebar.SideBarItemDescriptor#itemInvoked(com.vaadin.ui.UI)}must be called.
If you want to use your own factory, make a Spring managed bean that implements this interface. It will automatically be used by the {@link org.vaadin.spring.stuff.sidebar.SideBar}.