Returns the icon name of the button.
If the icon name has not been set with gtk.button.Button.setIconName 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.
The icon name set via gtk.button.Button.setIconName
Returns the icon name of the button.
If the icon name has not been set with gtk.button.Button.setIconName 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.