set_label
Description:
Sets the text of this.
If [property@Gtk.CheckButton:use-underline] is true, an underscore in label is interpreted as
mnemonic indicator, see [method@Gtk.CheckButton.set_use_underline] for details on this behavior.
Parameters:
| this |
a `GtkCheckButton` |
| label |
The text shown next to the indicator, or null to show no text |