def __init__(self, timestamp, family=None, reverse=False):
self.timestamp = timestamp<EOL>self.reverse = reverse<EOL>self._family = family<EOL>
Create a timestamp rule.

        Args:
            timestamp (int): Epoch time.
            family (str): Package family to apply the rule to.
            reverse (bool): If True, reverse the logic so that packages released
                *after* the timestamp are matched.