code: public SessionProvider getSystemSessionProvider(Object key)
     {
        if (systemProviders.containsKey(key))
        {
           return systemProviders.get(key);
        }
        else
        {
           final SessionProvider ssp = SessionProvider.createSystemProvider();
           systemProviders.put(key, ssp);
           return ssp;
        }
     }
docs: /*
  (non-Javadoc)
  @see
  org.exoplatform.services.jcr.ext.app.SessionProviderService#getSystemSessionProvider(java.lang
  .Object)