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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 set_default_preferences(self):
 """ Defines the default settings file content. :return: Method success. :rtype: bool """


        LOGGER.debug("> Initializing default settings!")

        for key in self.__default_settings.allKeys():
            self.__settings.setValue(key, self.__default_settings.value(key))

        self.set_default_layouts()
        return True