Test cases for the render set meta data
exmaple of a render set descriptor:
org.jboss.portal.theme.impl.render.div.DivRegionRendererorg.jboss.portal.theme.impl.render.div.DivWindowRendererorg.jboss.portal.theme.impl.render.div.DivPortletRendererorg.jboss.portal.theme.impl.render.div.DivDecorationRendererorg.jboss.portal.theme.impl.render.empty.EmptyRegionRendererorg.jboss.portal.theme.impl.render.empty.EmptyWindowRendererorg.jboss.portal.theme.impl.render.empty.EmptyPortletRendererorg.jboss.portal.theme.impl.render.empty.EmptyDecorationRenderer
Returns the portlet URL string representation to be embedded in the markup. Note that the returned String may
not be a valid URL, as it may be rewritten by the portal/portlet-container before returning the markup to the
client.