/**
 * @method createBlankOrder
 * @description creates a blank order for a contact
 *
 * @param int $conId
 * @param string $desc
 * @param date $oDate
 * @param int $leadAff
 * @param int $saleAff
 *
 * @return int
 */
public function blankOrder( $conId, $desc, $oDate, $leadAff, $saleAff ) {
    $carray = array(
        php_xmlrpc_encode( (int) $conId ),
        php_xmlrpc_encode( $desc ),
        php_xmlrpc_encode( $oDate, array( 'auto_dates' ) ),
        php_xmlrpc_encode( (int) $leadAff ),
        php_xmlrpc_encode( (int) $saleAff )
    );

    return $this->methodCaller( "InvoiceService.createBlankOrder", $carray );
}