public function setIContact(CNabuIContact $nb_icontact)
    {
        $this->nb_icontact = $nb_icontact;
        if ($this instanceof CNabuDataObject && $nb_icontact->contains(NABU_ICONTACT_FIELD_ID)) {
            $this->transferValue($nb_icontact, NABU_ICONTACT_FIELD_ID);
        }

        return $this;
    }