code: public static function createResourceName($containerName = '', $blobName = '')
      {
          $resourceName = $containerName . '/' . $blobName;
          if ($containerName === '' || $containerName === '$root') {
              $resourceName = $blobName;
          }
          if ($blobName === '') {
              $resourceName = $containerName;
          }
  
          return $resourceName;
      }
docs: Create resource name
  
  @param string $containerName  Container name
  @param string $blobName Blob name
  @return string