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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_missense_status(self, hgvs_string):
 """Sets the self.is_missense flag."""

        # set missense status
        if re.search('^[A-Z?]\d+[A-Z?]$', hgvs_string):
            self.is_missense = True
            self.is_non_silent = True
        else:
            self.is_missense = False