Obtains the widget which was constructed from the
with the given
gtk_item_factory_get_widget_by_action has been deprecated since version 2.4 and should not be used in newly-written code. Use
an action as specified in the
If there are multiple items with the same action, the result is undefined.
GtkWidget] the widget which corresponds to the given action, or
if no widget was found. [ allow-none ]
Derived by RGtkGen from GTK+ documentation
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