by the widget and must not be modified or freed.
Button.getLabel
string getLabel()Fetches the text from the label of the button.
If the label text has not been set with [gtk.button.Button.setLabel] the return value will be null. This will be the case if you create an empty button with [gtk.button.Button.new_] to use as a container.
Returns
The text of the label widget. This string is owned