Draws a horizontal or vertical line to separate other widgets.
<picture> <source srcset="separator-dark.png" media="(prefers-color-scheme: dark)"> <img alt="An example GtkSeparator" src="separator.png"> </picture>
A `GtkSeparator` can be used to group the widgets within a window. It displays a line with a shadow to make it appear sunken into the interface.
`GtkSeparator` has a single CSS node with name separator. The node gets one of the .horizontal or .vertical style classes.
`GtkSeparator` uses the [enum@Gtk.AccessibleRole.separator] role.