code: function(arr){
    var i, len = arr.length;
    this.added || (this.added = {});
    arr.forEach((item) => {
      if(this.added[item.cid]){ return; }
      this.added[item.cid] = 1;
      if(item.isLazyValue){ item.makeDirty(); }
      this.push(item);
    });
  }
docs: A convenience method to push only unique eleents in an array of objects to the TO_RENDER queue. If the element is a Lazy Value, it marks it as dirty in the process