docs: function(lir) {
        var createChildEvent = undefined;
        lir.renderMainThread.iterateAllEvents(function(event) {
          if (event.title !== CREATE_CHILD_TITLE)
            return;
  
          if (event.args.child !== lir.routingId)
            return;
  
          createChildEvent = event;
        });
  
        if (!createChildEvent)
          return undefined;
  
        return createChildEvent.args.id;
      }