public function load(ObjectManager $manager)
 {
     $faker = Factory::create();
     foreach ($this->countries as $key => $value) {
         $country = new Country();
         static $i = 1;
         $country->setTitle($value);
         $country->setInfo($faker->realText($maxNbChars = 3000, $indexSize = 2));
         $country->setFlag('/image/flag_of_country/Flag_of_' . $value . '.svg.png');
         $this->addReference("country {$i}", $country);
         $i++;
         $manager->persist($country);
     }
     $manager->flush();
 }