Gtk.Label.prototype.set_text_with_mnemonic

function set_text_with_mnemonic(str:String):void {
    // Gjs wrapper for gtk_label_set_text_with_mnemonic()
}

Sets the label's text from the string str. If characters in str are preceded by an underscore, they are underlined indicating that they represent a keyboard accelerator called a mnemonic. The mnemonic key can be used to activate another widget, chosen automatically, or explicitly using Gtk.Label.prototype.set_mnemonic_widget.