public function add($index, $data = null, $toAdmin = false)
	{
		if (!$this->has($index))
		{
			$this->data = Arr::add($this->data, $index, $data);

			$this->metas = Arr::add($this->metas, $this->firstIndex($index), ['admin' => $toAdmin]);
		}

		return $this;
	}