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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 if_none_match(self):
 """ Get the if-none-match option of a request. :return: True, if if-none-match is present :rtype : bool """

        for option in self.options:
            if option.number == defines.OptionRegistry.IF_NONE_MATCH.number:
                return True
        return False