code: def set_file_metadata(ase, metadata, timeout=None):
      # type: (blobxfer.models.azure.StorageEntity, dict, int) -> None
      
      dir, fpath, _ = parse_file_path(ase.name)
      ase.client.set_file_metadata(
          share_name=ase.container,
          directory_name=dir,
          file_name=fpath,
          metadata=metadata,
          timeout=timeout)
docs: Set file metadata
      :param blobxfer.models.azure.StorageEntity ase: Azure StorageEntity
      :param dict metadata: metadata kv pairs
      :param int timeout: timeout