Which page decorators show the sidebar in the atl.general view?

I want to add a page to the general view of JIRA. Currently, I use a web-panel:

I want to replace the web-panel with a Servlet that renders the velocity template. I now face the issue that I don’t know how to show the side bar on the left side.

I currently only use this decorator in the velocity template file:

<meta name="decorator" content="atl.general">

Do you know which page decorators to use to show the sidebar? Thanks!

This is similar to this post, but I did not understand whether this solves the question: Project sidebar and atl.general decorator