code: func initSessionEngine() {
  	// Check for session engine to use and assign it
  	sename := Config.StringDefault("session.engine", "revel-cookie")
  	if se, found := sessionEngineMap[sename]; found {
  		CurrentSessionEngine = se()
  	} else {
  		sessionLog.Warn("Session engine '%s' not found, using default session engine revel-cookie", sename)
  		CurrentSessionEngine = sessionEngineMap["revel-cookie"]()
  	}
  }
docs: // Called when application is starting up