public function getProspectStatusTypeByKey(string $key)
    {
        $retval = false;

        if (is_string($key)) {
            $this->getProspectStatusTypes();
            $retval = $this->nb_icontact_prospect_status_type_list->getItem($key, CNabuIContactProspectStatusTypeList::INDEX_KEY);
        }

        return $retval;
    }