GdkX11.X11Window.prototype.set_theme_variant
function set_theme_variant(variant: String): void { // Gjs wrapper for gdk_x11_window_set_theme_variant() }
GTK+ applications can request a dark theme variant. In order to make other applications - namely window managers using GTK+ for themeing - aware of this choice, GTK+ uses this function to export the requested theme variant as _GTK_THEME_VARIANT property on toplevel windows.
Note that this property is automatically updated by GTK+, so this function should only be used by applications which do not use GTK+ to create toplevel windows.
Since 3.2
- variant
the theme variant to export