Creates a new GtkRadioMenuItem whose child is a simple GtkLabel.
The new GtkRadioMenuItem is added to the same group as group.
If mnemonic is true the label will be
created using Label.newWithMnemonic, so underscores in label
indicate the mnemonic for the menu item.
Since 2.4
Creates a new GtkRadioMenuItem whose child is a simple GtkLabel. The new GtkRadioMenuItem is added to the same group as group. If mnemonic is true the label will be created using Label.newWithMnemonic, so underscores in label indicate the mnemonic for the menu item. Since 2.4