code: def create_unique_transfer_operation_id(ase):
          # type: (blobxfer.models.azure.StorageEntity) -> str
          
          return ';'.join(
              (ase._client.primary_endpoint, ase.path, str(ase.vectored_io))
          )
docs: Create a unique transfer operation id
          :param blobxfer.models.azure.StorageEntity ase: storage entity
          :rtype: str
          :return: unique transfer id