if (from_cluster_name) {
      outgoing_edge_infos[*from_cluster_name][{to->name(), to_cluster_name}]++;
      cluster_names_to_print.insert(*from_cluster_name);
    }
  }

  VLOG(4) << "*** Inter-Cluster edges:";
  if (cluster_names_to_print.empty()) {
    VLOG(4) << "   [none]";
  }

  auto print_edge_info_set_for_cluster = [&](absl::string_view cluster_name,