php - How to use repositories properly -

im using laravel 5.4 , im trying figure out new application how set well. digged repositories didnt gave real answer. found https://bosnadev.com/2015/03/07/using-repository-pattern-in-laravel-5/ , sounds pretty clear me.

a old co worker told me way of using repositories im taking answer not well... showed me this:

class examplerepository {     public function __construct()     {         $this->models();     }      private function models()     {         $this->user = app( user::class );     }      public function finduser( $userid )     {         return $this->user->find( $userid );     } } 

my real question: example should use according standards , flexibility?