Hide Plugin Widget Topbar

I’m trying to hide the topbar on my plugin’s widget. You can already hide the title, but I want to remove the default bar with the close button.
Is there any way to do this? I want to replace this with my own title and close button instead. Any help would be appreciated.

I don’t think there’s a way to hide the topbar.

Why would you need your own title and close button?

Because I don’t like the default one. I want to add a custom title, menu button and close button. And yeah, at this point I also don’t think there’s a way to do that.