/**
  * Get search aliases for specified entity class(es). By default returns all associated entities.
  *
  * @param string[] $entities
  *
  * @return string[]
  */
 protected function getSearchAliases(array $entities)
 {
     if (empty($entities)) {
         $entities = array_flip($this->activityManager->getActivityTargets($this->class));
     }
     return array_values($this->searchIndexer->getEntityAliases($entities));
 }
 /**
  * Returns search aliases for all the Customer entities
  *
  * @return string[]
  */
 protected function getCustomerSearchAliases()
 {
     return array_values($this->searchIndexer->getEntityAliases($this->getCustomerEntities()));
 }