Gtk.RadioMenuItem.new_with_mnemonic_from_widget

function new_with_mnemonic_from_widget(group:Gtk.RadioMenuItem, label:String):Gtk.Widget {
    // Gjs wrapper for gtk_radio_menu_item_new_with_mnemonic_from_widget()
}

Creates a new GtkRadioMenuItem containing a label. The label will be created using Gtk.Label.new_with_mnemonic, so underscores in label indicate the mnemonic for the menu item.

The new Gtk.RadioMenuItem is added to the same group as group.

Since 2.4