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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 toggle_use_font_background_sensitivity(self, chk):
 """If the user chooses to use the gnome default font configuration it means that he will not be able to use the font selector. """

        self.get_widget('palette_16').set_sensitive(chk.get_active())
        self.get_widget('palette_17').set_sensitive(chk.get_active())