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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def next(self):
 """ This method is deprecated, a holdover from when queries were iterators, rather than iterables. @return: one element of massaged data. """

        if self._selfiter is None:
            warnings.warn(
                "Calling 'next' directly on a query is deprecated. "
                "Perhaps you want to use iter(query).next(), or something "
                "more expressive like store.findFirst or store.findOrCreate?",
                DeprecationWarning, stacklevel=2)
            self._selfiter = self.__iter__()
        return self._selfiter.next()