def METHOD_NAME(deploy_id: str) -> str:
    """
    Get backup path prefix for current deployment
    Prefix path is BACKUP_STORAGE/{id}.
    Globbing directories starting with the prefix will yield
    list of backups for the deployment.
    """
    BuiltIn().should_not_be_empty(BACKUP_STORAGE)
    BuiltIn().should_not_be_empty(deploy_id)
    return os.path.join(BACKUP_STORAGE, deploy_id)