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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 _add_spacer_to_menu(self):
 """Create a spacer to the menu to separate action groups."""

        separator = QAction(self.iface.mainWindow())
        separator.setSeparator(True)
        self.iface.addPluginToMenu(self.tr('InaSAFE'), separator)