CampContext::registerListObject PHP Method

    private final function registerListObject(array $listObject)
    {
        try {
            // check the structure
            $keys = array_keys($listObject);
            $values = array_values($listObject);
            if (count($keys) !== 1 || count($values) !== 1) {
                throw new Exception('CampContext::registerListObject called with malformed parameter: ' . print_r($listObject));
            }
        } catch (Exception $e) {
            $this->trigger_invalid_register_error($e->getMessage());
        }
        $this->m_listObjects += $listObject;
    }