<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _make_cls(self, value):
 """If value is not instance of self._cls, converts and returns it. Otherwise, returns value. :param value: the thing to make a self._cls from :rtype self._cls """

        if isinstance(value, self._cls):
            return value
        return self._cls(value)