/**
  * Get attribute alias as "entity_type/attribute_code"
  *
  * @param \Magento\Eav\Model\Entity\AbstractEntity $entity exclude this entity
  * @return string
  */
 public function getAlias($entity = null)
 {
     $alias = '';
     if ($entity === null || $entity->getType() !== $this->getEntity()->getType()) {
         $alias .= $this->getEntity()->getType() . '/';
     }
     $alias .= $this->getAttributeCode();
     return $alias;
 }