Sets @label as the label used for the tool button. The “label” property
only has an effect if not overridden by a non-%NULL “label_widget” property.
If both the “label_widget” and “label” properties are %NULL, the label
is determined by the “stock_id” property. If the “stock_id” property is also
%NULL, @button will not have a label.
Sets @label as the label used for the tool button. The “label” property only has an effect if not overridden by a non-%NULL “label_widget” property. If both the “label_widget” and “label” properties are %NULL, the label is determined by the “stock_id” property. If the “stock_id” property is also %NULL, @button will not have a label.