eZ\Publish\Core\FieldType\Country\Type::fromHash PHP Method

    public function fromHash($hash)
    {
        if ($hash === null) {
            return $this->getEmptyValue();
        }
        $countries = array();
        foreach ($hash as $country) {
            foreach ($this->countriesInfo as $countryInfo) {
                switch ($country) {
                    case $countryInfo['Name']:
                    case $countryInfo['Alpha2']:
                    case $countryInfo['Alpha3']:
                        $countries[$countryInfo['Alpha2']] = $countryInfo;
                        continue 3;
                }
            }
            throw new InvalidValue($country);
        }
        return new Value($countries);
    }