Cake\ElasticSearch\Association\Embedded::type PHP Method

    public abstract function type();

 /**
  * Merge an embedded document.
  *
  * @param \Cake\ElasticSearch\Association\Embedded $embed The embed definition.
  * @param \Cake\ElasticSearch\Document|array $existing The existing entity or entities.
  * @param array $data The data to marshal
  * @return array|Cake\ElasticSearch\Document Either a document or an array of documents.
  */
 protected function mergeNested(Embedded $embed, $existing, array $data)
 {
     $class = $embed->entityClass();
     if ($embed->type() === Embedded::ONE_TO_ONE) {
         if (!$existing instanceof EntityInterface) {
             $existing = new $class();
         }
         $existing->set($data);
         return $existing;
     }
     if ($embed->type() === Embedded::ONE_TO_MANY) {
         foreach ($existing as $i => $row) {
             if (isset($data[$i])) {
                 $row->set($data[$i]);
             }
             unset($data[$i]);
         }
         foreach ($data as $row) {
             if (is_array($row)) {
                 $new = new $class();
                 $new->set($row);
                 $existing[] = $new;
             }
         }
         return $existing;
     }
 }