code: func (c *Controller) Stats() map[string]interface{} {
  	result := CurrentEngine.Stats()
  	if RevelConfig.Controller.Reuse {
  		result["revel-controllers"] = RevelConfig.Controller.Stack.String()
  		for key, appStack := range RevelConfig.Controller.CachedMap {
  			result["app-" + key] = appStack.String()
  		}
  	}
  	return result
  }
docs: // This stats returns some interesting stats based on what is cached in memory
  // and what is available directly