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Is there something wrong in line 37?about new acl()

when I test the multiple explame, there is a error :

Fatal error: Class 'Acl' not found in C:\wamp\www\hostm\apps\frontend\Module.php on line 37

here is the code: https://github.com/phalcon/mvc/blob/master/multiple/apps/frontend/Module.php

It's confused...

Yes, the class \Acl doesn't exist. There is no Acl class in the Multiple namespace either (would be \Multiple\Acl).

I suspect it's just a dummy example line left as an exercise to the reader, but I'm unfamiliar with the mvc repo examples. If 'multiple' is supposed to be a working example, it may work after you comment out the line in question.