Accordion An Spark Accordion navigator container has a collection IVisualElements, but only one of them at a time is fully visible.
 DeferredGroup The DeferredGroup class enables deferred instatiation of child elements via is creationPolicy property.
 Navigator The SkinnableContainer class is the base class for skinnable containers that have visual content.
 NavigatorGroup The NavigatorGroup class is the base container for navigating all visual elements.