def get_message(self, key):
        subpath = self._lookup(key)
        f = open(os.path.join(self._path, subpath), 'r')
        try:
            if self._factory:
                msg = self._factory(f)
            else:
                msg = MaildirMessage(f)
        finally:
            f.close()
        subdir, name = os.path.split(subpath)
        msg.set_subdir(subdir)
        if self.colon in name:
            msg.set_info(name.split(self.colon)[-1])
        msg.set_date(os.path.getmtime(os.path.join(self._path, subpath)))
        return msg
Test the add additonal context method
dataset/ETHPy150Open babble/babble/include/jython/Lib/mailbox.py/Maildir.get_message--crossover with--dataset/ETHPy150Open toumorokoshi/sprinter/sprinter/core/tests/test_manifest.py/TestManifest.test_add_additional_context