Gtk.Expander.prototype.set_use_markup

function set_use_markup(use_markup:Boolean):void {
    // Gjs wrapper for gtk_expander_set_use_markup()
}

Sets whether the text of the label contains markup in <link linkend="PangoMarkupFormat">Pango's text markup language</link>. See Gtk.set_markup.

Since 2.4