public function get_merge_vars($key = null, $rcpt = null)
	{
		if (is_null($rcpt))
		{
			return \Arr::get($this->merge_vars, $key);
		}
		elseif (isset($this->rcpt_merge_vars[$rcpt]))
		{
			return \Arr::get($this->rcpt_merge_vars[$rcpt], $key);
		}
	}