Vertical split container.
Vertical split container. See [SplitContainer]. This goes from top to bottom.
https://docs.godotengine.org/en/3.5.1/tutorials/ui/gui_containers.html
Boolean value. If 1 ([code]true[/code]), the grabber will hide automatically when it isn't under the cursor. If 0 ([code]false[/code]), it's always visible.
The space between sides of the container.
The icon used for the grabber drawn in the middle area.