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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 get_code(self):
 """ the final code for multi-checks arguments: the worst-case code from all added results, or UNKNOWN if none were added """

        code = UNKNOWN
        for result in self._results:
            if code == UNKNOWN or (result.code < UNKNOWN
                                   and result.code > code):
                code = result.code
        return code