public function getChoices()
    {
        $choices = $this->getOrderedRoles();

        if (isset($choices['ROLE_SUPER_ADMIN'])) {
            unset($choices['ROLE_SUPER_ADMIN']);
        }

        if (isset($choices['ROLE_ADMIN']) && !$this->isCurrentUserSuperAdmin()) {
            unset($choices['ROLE_ADMIN']);
        }

        return $choices;
    }