code: function order(g, maxSweeps) {
    if (arguments.length < 2) {
      maxSweeps = DEFAULT_MAX_SWEEPS;
    }
  
    var layerGraphs = initLayerGraphs(g);
    // TODO: remove this when we add back support for ordering clusters
    layerGraphs.forEach(function(lg) {
      lg = lg.filterNodes(function(u) { return !g.children(u).length; });
    });
  
    initOrder(g);
  
    util.log(2, 'Order phase start cross count: ' + g.graph().orderInitCC);
  
    var i, lastBest;
    for (i = 0, lastBest = 0; lastBest < 4 && i < maxSweeps; ++i, ++lastBest) {
      sweep(g, layerGraphs, i);
      if (saveBest(g)) {
        lastBest = 0;
      }
      util.log(3, 'Order phase iter ' + i + ' cross count: ' + g.graph().orderCC);
    }
  
    restoreBest(g);
  
    util.log(2, 'Order iterations: ' + i);
    util.log(2, 'Order phase best cross count: ' + g.graph().orderCC);
  }
docs: /*
  Runs the order phase with the specified `graph, `maxSweeps`, and
  `debugLevel`. If `maxSweeps` is not specified we use `DEFAULT_MAX_SWEEPS`.
  If `debugLevel` is not set we assume 0.