def add_flag(self, flag):
        self.set_flags(''.join(set(self.get_flags()) | set(flag)))
Convenience method for conditional requests.
dataset/ETHPy150Open babble/babble/include/jython/Lib/mailbox.py/MaildirMessage.add_flag--crossover with--dataset/ETHPy150Open Eforcers/gae-flask-todo/lib/werkzeug/http.py/is_resource_modified