Gtk.LevelBar.prototype.add_offset_value

function add_offset_value(name:String, value:Number):void {
    // Gjs wrapper for gtk_level_bar_add_offset_value()
}

Adds a new offset marker on self at the position specified by value. When the bar value is in the interval topped by value (or between value and Gtk.max-value in case the offset is the last one on the bar) a style class named <literal>level-</literal>name will be applied when rendering the level bar fill. If another offset marker named name exists, its value will be replaced by value.

Since 3.6