protected function configureSegments()
{
$segment = new Segment();
$segment->setSegment('countryCode');
$segment->setName('UserCountry_Country');
$segment->setAcceptedValues('de, us, fr, in, es, etc.');
$this->addSegment($segment);
$segment = new Segment();
$segment->setSegment('continentCode');
$segment->setName('UserCountry_Continent');
$segment->setSqlFilter('Piwik\\Plugins\\UserCountry\\UserCountry::getCountriesForContinent');
$segment->setAcceptedValues('eur, asi, amc, amn, ams, afr, ant, oce');
$this->addSegment($segment);
}