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