code: private static void applySystemProperties(Properties properties)
     {
        if (properties != null)
        {
           for (Map.Entry<Object, Object> entry : properties.entrySet())
           {
              String key = (String)entry.getKey();
              if (key.startsWith("system.property."))
              {
                 key = key.substring(16);
                 SecurityActions.setSystemProperty(key, (String)entry.getValue());
              }
           }
        }
     }
docs: Apply any defined system properties
  @param properties The properties