public function getCurrencyIdByCode($code) {
        $this->sError = FALSE;

        if ($this->_currencyCode2Id === FALSE) {
            $this->_loadCurrencyCodes();
        }

        if (!isset($this->_currencyCode2Id[$code])) {
            $this->sError = 'Incorect currency code: ' . $code;
            return FALSE;
        }

        return $this->_currencyCode2Id[$code];
    }