@staticmethod
def create_unique_transfer_operation_id(ase):
    """Create a unique transfer operation id
        :param blobxfer.models.azure.StorageEntity ase: storage entity
        :rtype: str
        :return: unique transfer id
        """
    return ';'.join((ase._client.primary_endpoint, ase.path, str(ase.
        vectored_io)))
