message: fix lb: iterator -> array
diff: @@ -565,8 +565,8 @@ const _ = require('underscore');
  }
  } ar = 0; } gh = 0; } ci = 0; } l = 0; } c = 0; } g = 0; }
  - var tiers = _.each(_.groupBy([...tiersSet.keys()], function(tierString) {
  - return _.reduce(tierString.toString().split('/'), function(memo, num){
  + var tiers = _.each(_.groupBy(Array.from(tiersSet.keys()), function(tierString) {
  + return _.reduce(tierString.split('/'), function(memo, num){
  return memo + parseInt(num, 10);
  }, 0);
  }), function(tier) {
  