public function deleteAddressBookContact($addressBookId, $contactId)
    {
        //Only if there is a contact id and address book id
        if ($addressBookId && $contactId) {
            $url = $this->getApiEndpoint() . self::REST_ADDRESS_BOOKS . $addressBookId
                . '/contacts/' . $contactId;
            $this->setUrl($url)
                ->setVerb('DELETE');
            $this->execute();
            $this->helper->log(sprintf('Delete-contact %s from addressbook %s', $contactId, $addressBookId));
        }
    }