Javadoc
Scans for factory plug-ins on the application class path. This method is needed because the application class path can
theoretically change, or additional plug-ins may become available. Rather than re-scanning the classpath on every invocation of
the API, the class path is scanned automatically only on the first invocation. Clients can call this method to prompt a
re-scan. Thus this method need only be invoked by sophisticated applications which dynamically make new plug-ins available at
runtime.