code: public function rename($path_from, $path_to)
      {
          if ($this->getContainerName($path_from) != $this->getContainerName($path_to)) {
              throw new BlobException('Container name can not be changed.');
          }
  
          if ($this->getFileName($path_from) == $this->getContainerName($path_to)) {
              return true;
          }
  
          $this->getStorageClient($path_from)->copyBlob(
              $this->getContainerName($path_from),
              $this->getFileName($path_from),
              $this->getContainerName($path_to),
              $this->getFileName($path_to)
          );
          $this->getStorageClient($path_from)->deleteBlob(
              $this->getContainerName($path_from),
              $this->getFileName($path_from)
          );
  
          // Clear the stat cache for the affected paths.
          clearstatcache(true, $path_from);
          clearstatcache(true, $path_to);
          return true;
      }
docs: Attempt to rename the item
  
  @param  string  $path_from
  @param  string  $path_to
  @return boolean False