谷歌应用程序脚本- Gmail，删除永久电子邮件在垃圾与特定标签

I'm trying to make a script that automatically deletes e-mails from a certain sender immediately and permanently, as Gmail only allows for a filter which sends an e-mail to trash for 30 days. Please do not suggest that the default filter is enough, as for my situation, it is vital that I do not know that I was sent an e-mail from this sender.I'm trying to make a script that automatically