protected function getAllRoles(User $user)
    {
        $roles = [
            'Neos.Flow:Everybody' => $this->policyService->getRole('Neos.Flow:Everybody'),
            'Neos.Flow:AuthenticatedUser' => $this->policyService->getRole('Neos.Flow:AuthenticatedUser')
        ];

        /** @var Account $account */
        foreach ($user->getAccounts() as $account) {
            $accountRoles = $account->getRoles();
            /** @var $currentRole Role */
            foreach ($accountRoles as $currentRole) {
                if (!in_array($currentRole, $roles)) {
                    $roles[$currentRole->getIdentifier()] = $currentRole;
                }
                /** @var $currentParentRole Role */
                foreach ($currentRole->getAllParentRoles() as $currentParentRole) {
                    if (!in_array($currentParentRole, $roles)) {
                        $roles[$currentParentRole->getIdentifier()] = $currentParentRole;
                    }
                }
            }
        }

        return $roles;
    }