def create_unique_transfer_operation_id(src_ase, dst_ase):
        # type: (blobxfer.models.azure.StorageEntity,
        #        blobxfer.models.azure.StorageEntity) -> str
        """Create a unique transfer operation id
        :param blobxfer.models.azure.StorageEntity src_ase: src storage entity
        :param blobxfer.models.azure.StorageEntity dst_ase: dst storage entity
        :rtype: str
        :return: unique transfer id
        """
        return ';'.join(
            (src_ase._client.primary_endpoint, src_ase.path,
             dst_ase._client.primary_endpoint, dst_ase.path)
        )
Create a unique transfer operation id
        :param blobxfer.models.azure.StorageEntity src_ase: src storage entity
        :param blobxfer.models.azure.StorageEntity dst_ase: dst storage entity
        :rtype: str
        :return: unique transfer id