docs: def _build_g5k_conf(vmong5k_conf):
      """Build the conf of the g5k provider from the vmong5k conf."""
      clusters = [m.cluster for m in vmong5k_conf.machines]
      sites = g5k_api_utils.get_clusters_sites(clusters)
      site_names = set(sites.values())
      if len(site_names) > 1:
          raise Exception("Multisite deployment not supported yet")
      site = site_names.pop()
      return _do_build_g5k_conf(vmong5k_conf, site)