code: public function mapFromForm($value)
      {
          $data  = [];
          $value = ArrayUtil::ensureArray($value);
  
          $arrayValues = ArrayUtil::ensureArray(array_values($value));
  
          foreach ($arrayValues as $arrayKeyIterator) {
              $data[$arrayKeyIterator] = $this->valueProvider->getValue();
          }
  
          return $data;
      }
docs: @param string[] $value |null
  
  @return string[]