code: function addLoadToLinkSet(linkSet, load) {
        console.assert(load.status == 'loading' || load.status == 'loaded', 'loading or loaded on link set');
  
        for (var i = 0, l = linkSet.loads.length; i < l; i++)
          if (linkSet.loads[i] == load)
            return;
  
        linkSet.loads.push(load);
        load.linkSets.push(linkSet);
  
        // adjustment, see https://bugs.ecmascript.org/show_bug.cgi?id=2603
        if (load.status != 'loaded') {
          linkSet.loadingCount++;
        }
  
        var loader = linkSet.loader;
  
        for (var i = 0, l = load.dependencies.length; i < l; i++) {
          var name = load.dependencies[i].value;
  
          if (loader.modules[name])
            continue;
  
          for (var j = 0, d = loader.loads.length; j < d; j++) {
            if (loader.loads[j].name != name)
              continue;
  
            addLoadToLinkSet(linkSet, loader.loads[j]);
            break;
          }
        }
        // console.log('add to linkset ' + load.name);
        // snapshot(linkSet.loader);
      }
docs: 15.2.5.2.2