/**
  * {@inheritdoc}
  */
 public function load(ObjectManager $manager)
 {
     foreach ($this->attributes as $item) {
         // Create attribute label
         $label = new AttributeLabel();
         $label->setValue($item['label']);
         // Create attribute
         $attribute = new Attribute();
         $attribute->setCode($item['code']);
         $attribute->setType($item['type']);
         $attribute->setSharingType(SharingType::GENERAL);
         $attribute->setLocalized($item['localized']);
         $attribute->setSystem($item['system']);
         $attribute->setRequired($item['required']);
         $attribute->setUnique($item['unique']);
         $attribute->addLabel($label);
         if (isset($item['options'])) {
             foreach ($item['options'] as $optionItem) {
                 $masterOption = new AttributeOption();
                 $masterOption->setValue($optionItem['value']);
                 $masterOption->setOrder($optionItem['order']);
                 $attribute->addOption($masterOption);
             }
         }
         $manager->persist($attribute);
     }
     if (!empty($this->attributes)) {
         $manager->flush();
         $manager->clear();
     }
 }