/**
  * @param DocumentInterface $document the document where the indexable data must be applied to.
  * Override this method in a record to define which data should get indexed. By default all
  * record attributes get indexed.
  */
 public function populateElasticDocument(DocumentInterface $document)
 {
     $document->setId($this->owner->getPrimaryKey());
     foreach ($this->owner->attributeNames() as $name) {
         $document->{$name} = $this->owner->{$name};
     }
 }