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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def destroy(self):
 """ Destroy the underlying QWidget object. """

        self._teardown_features()
        focus_registry.unregister(self.widget)
        widget = self.widget
        if widget is not None:
            del self.widget
        super(QtGraphicsItem, self).destroy()
        # If a QWidgetAction was created for this widget, then it has
        # taken ownership of the widget and the widget will be deleted
        # when the QWidgetAction is garbage collected. This means the
        # superclass destroy() method must run before the reference to
        # the QWidgetAction is dropped.
        del self._widget_action