GtkPaned: How to make the handle invisible?

How do I make the handle of a GtkPaned invisible?

I couldn’t find any property on the object or in CSS. handle-size looks promising, but that’s a read-only property.

image

Make the paned child at the bottom invisible.

Make the paned child at the bottom invisible.

But then the bottom pane would be invisible, which is not what I want (?)

If the handle isn’t visible, how can you drag it?

If the handle isn’t visible, how can you drag it?

The user knows it’s there. They don’t need the line to indicate it.

You can use the Inspector to know what style classes are currently applied.

The selectors are documented in the API reference.

You can use the Inspector to know what style classes are currently applied.
The selectors are documented in the API reference.

Thank you!

This is the CSS:

paned separator{
  background: none;
}