String clazzName = System.getProperty(PROP_SIGNINGSUPPORT, DEFAULT_SIGNEDBUNDLE_SUPPORT);
String clazzName = FrameworkProperties.getProperty(PROP_SIGNINGSUPPORT, DEFAULT_SIGNEDBUNDLE_SUPPORT);
	protected SignedBundleSupport getSignedBundleSupport() {		if (System.getSecurityManager() == null || !supportSignedBundles)			return null;		try {			if (signedBundleSupport == null) {				String clazzName = System.getProperty(PROP_SIGNINGSUPPORT, DEFAULT_SIGNEDBUNDLE_SUPPORT);				Class clazz = Class.forName(clazzName);				signedBundleSupport = (SignedBundleSupport) clazz.newInstance();			}			return signedBundleSupport;		} catch (ClassNotFoundException e) {			supportSignedBundles = false;		} catch (IllegalAccessException e) {			supportSignedBundles = false;		} catch (InstantiationException e) {			supportSignedBundles = false;		}		return null;	}