/**
  * @internal
  */
 private function serializeIndexes()
 {
     foreach ($this->object->iterateIndex() as $index) {
         $this->string .= (string) $index;
     }
 }
 /**
  * @internal
  * @throws \InvalidArgumentException
  * @throws \LTDBeget\sphinx\configurator\exceptions\SectionException
  * @throws \LogicException
  */
 private function serializeIndex()
 {
     foreach ($this->objectConfiguration->iterateIndex() as $index) {
         $this->arrayConfiguration[] = $index->toArray();
     }
 }