@property
def extra_features(self):
    if (self._extra_features is None):
        level_features = set(())
        if (int(self) == 2):
            level_features = set(Compliance.ALL_LEVEL_2)
        elif (int(self) == 1):
            level_features = set(Compliance.ALL_LEVEL_1)
        self._extra_features = (set(self.all_enabled_features) - level_features)
    return st(self._extra_features)
@property
def extra_features(self):
    if (self._extra_features is None):
        level_features = set(())
        if (int(self) == 2):
            level_features = set(Compliance.ALL_LEVEL_2)
        elif (int(self) == 1):
            level_features = set(Compliance.ALL_LEVEL_1)
        self._extra_features = (set(self.all_enabled_features) - level_features)
    return st(self._extra_features)