code: private function upgrade108($oldConfigPaths, $newConfigPaths)
      {
          foreach ($oldConfigPaths as $key => $value) {
              $oldValue = $this->scopeConfig->getValue($value);
              if ($oldValue != null) {
                  $this->configWriter->save($newConfigPaths[$key], $oldValue); // @codingStandardsIgnoreLine - currently best way to resolve this
              }
          }
      }
docs: Config path changes
  @param $oldConfigPaths
  @param $newConfigPaths