set_label_widget
Description:
Sets label_widget as the widget that will be used as the label for this.
If label_widget is null the
label property is used as label. If label is also
null, the label in the stock item determined by the
stock_id property is used as label. If
stock_id is also null,
this does not have a label.
Parameters:
| this | |
| label_widget |
the widget used as label, or null |