Gtk.Range.prototype.set_show_fill_level

function set_show_fill_level(show_fill_level:Boolean):void {
    // Gjs wrapper for gtk_range_set_show_fill_level()
}

Sets whether a graphical fill level is show on the trough. See Gtk.Range.prototype.set_fill_level for a general description of the fill level concept.

Since 2.12