Returns the stored portlet preferences.
Parameters: portletWindow - the portlet window. Parameters: request - the portlet request. the stored portlet preferences. throws: PortletContainerException - if fail to get stored preferences.
Stores the portlet references to the persistent storage.
Parameters: portletWindow - the portlet window. Parameters: request - the portlet request. Parameters: preferences - the portlet preferences to store. throws: PortletContainerException - if fail to store preferences.