'Create a new backup job on a target
:param target: Backup target with the backup data
:type  target: Instance of :class:`BackupTarget`
:param extra: (optional) Extra attributes (driver specific).
:type extra: ``dict``
:rtype: Instance of :class:`BackupTargetJob`'

def create_target_job(self, target, extra=None):

    raise NotImplementedError('create_target_job    not    implemented    for    this    driver')
