def fix_config(self, options):
        """
        Fixes the options, if necessary. I.e., it adds all required elements to the dictionary.

        :param options: the options to fix
        :type options: dict
        :return: the (potentially) fixed options
        :rtype: dict
        """
        options = super(CombineStorage, self).fix_config(options)

        opt = "format"
        if opt not in options:
            options[opt] = ""
        if opt not in self.help:
            self.help[opt] = "The format to use for generating the combined string; use '@{blah}' for accessing "\
                             "storage item 'blah' (string)."

        return options