Smile\ElasticsuiteCore\Api\Index\Mapping\FieldInterface::isSearchable PHP Method

    public function isSearchable();

 /**
  * Indicates if a field is used in fuzzy search.
  *
  * @SuppressWarnings(PHPMD.UnusedPrivateMethod)
  *
  * @param FieldInterface $field Mapping field.
  *
  * @return boolean
  */
 private function isFuzzyFieldCallback(FieldInterface $field)
 {
     return $field->isSearchable() && $field->isUsedInSpellcheck();
 }