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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 slugify(self, value):
        '''
        Apply slugification according to specified field rules
        '''
        if value is None:
            return

        return slugify.slugify(value, max_length=self.max_length,
                               separator=self.separator,
                               to_lower=self.lower_case)