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Niels De Graef authored
The `GVariant` that is passed on to the `GtkWidgetActionActivateFunc` can be `NULL` in case the parameter type is also `NULL`, so mark it nullable.
1387fba7
The `GVariant` that is passed on to the `GtkWidgetActionActivateFunc` can be `NULL` in case the parameter type is also `NULL`, so mark it nullable.