or null if there is none
Expander.getLabelWidget
gtk.widget.Widget getLabelWidget()Retrieves the label widget for the frame. See [gtk.expander.Expander.setLabelWidget].
Returns
the label widget,
gtk.widget.Widget getLabelWidget()Retrieves the label widget for the frame. See [gtk.expander.Expander.setLabelWidget].
or null if there is none