Api.php
public function getISO4127($currency)
    {
        if (!isset($this->currencies[$currency])) {
            throw new LogicException('Currency not allowed by the gateway.');
        }

        return $this->currencies[$currency];
    }
public function getISO4127($currency)
    {
        if (!isset($this->currencies[$currency])) {
            throw new LogicException('Currency not allowed by the gateway.');
        }

        return $this->currencies[$currency];
    }
@param $currency

@return mixed