<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def message(self):
 """Return default message for this element """

        if self.code != 200:
            for code in self.response_codes:
                if code.code == self.code:
                    return code.message

            raise ValueError("Unknown response code \"%s\" in \"%s\"." % (self.code, self.name))

        return "OK"