Retrieves the target of the mnemonic (keyboard shortcut) of this label.
See [method@Gtk.Label.set_mnemonic_widget].
the target of the label’s mnemonic, or %NULL if none has been set and the default algorithm will be used.
See Implementation
Retrieves the target of the mnemonic (keyboard shortcut) of this label.
See [method@Gtk.Label.set_mnemonic_widget].