gtk:radio-button-new-with-mnemonic-from-widget (member label)

member -- a gtk:radio-button widget to get radio group from or nil
label -- a string with the text of the button, with an underscore in front of the mnemonic character

The new gtk:radio-button widget.

Creates a new radio button containing a label. The label will be created using the gtk:label-new-with-mnemonic function, so underscores in label indicate the mnemonic for the button.