Creates a new #GtkCheckMenuItem containing a label. The label will be created using gtk.label.Label.newWithMnemonic, so underscores in label indicate the mnemonic for the menu item.
The text of the button, with an underscore in front of the character
a new #GtkCheckMenuItem
Creates a new #GtkCheckMenuItem containing a label. The label will be created using gtk.label.Label.newWithMnemonic, so underscores in label indicate the mnemonic for the menu item.