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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 ontop_toggled(self, settings, key, user_data):
 """If the gconf var window_ontop be changed, this method will be called and will set the keep_above attribute in guake's main window. """

        self.guake.window.set_keep_above(settings.get_boolean(key))