def get_annotation_url(cfg):
  """Returns (str): LogDog stream URL for the configured annotation stream.

  Args:
    cfg (Config): The bootstrap config.
  """
  return 'logdog://%(host)s/%(project)s/%(prefix)s/+/recipes/annotations' % {
      'host': cfg.host,
      'project': cfg.params.project,
      'prefix': cfg.prefix,
  }