Simplification.

src/UnicaenAuth/Provider/Identity/ChainEvent.php

@@ -40,9 +40,7 @@ class ChainEvent extends Event
      */
     public function addRoles(array $roles = array())
     {
-        foreach ($roles as $role) {
-            $this->roles[] = $role;
-        }
+        $this->roles = array_merge($this->roles, $roles);
         return $this;
     }