ictionary, if not it will try to retrieve the first one that
     * contains the country code.
     *
     * @param array $languageCodes
     * @return string
     */
    protected function extractValidLanguageCode(array $languageCodes)
    {
        // TODO Need Assertion to ensure $languageCodes is not empty and contains only strings

        /**
         * Filter Allowed Language Codes
         *
         * @param array $allowedLanguageCodes
         */
        $allowedLanguageCodes = apply_filters(
            self::FILTER_ALLOWED_LANGUAGE_CODE_SETTING,
            self::ALLOWED_LANGUAGE_CODES
        );

        if (empty($allowedLanguageCodes)) {
            // TODO Need validation for Language Code
            return (string)$languageCodes[0];
        }

        foreach ($languageCodes as $index => $languageCode) {
            if (in_array($languageCode, $allowedLanguageCodes, true)) {
                return $languageCode;
            }
        }

        foreach ($languageCodes as $languageCode) {
            foreach ($allowedLanguageCodes as $currentAllowedLanguageCode) {
                $countryCode = substr($currentAllowedLanguageCode, 0, 2);
                if ($countryCode === $languageCode) {
                    return $currentAllowedLanguageCode;
                }
            }
        }

        return self::SETTING_LOCALE_DEFAULT_LANGUAGE;
    }

    /**
     * Init all the gateways and add to the db for the first time
     * @param $gateway
     */
    protected function updateGatewaySettings($gateway)
    {
        $gateway->settings['enabled'] = $gateway->is_available() ? 'yes' : 'no';
        update_option(
            $gateway->id . "_settings",
            $gateway->settings
        );
    }
}