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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 _check_split_list_validity(self):
 """ See _temporal_split_list above. This function checks if the current split lists are still valid. """

        # FIXME: Currently very primitive, but needs to be fast
        if not (hasattr(self,"_splitListsSet") and (self._splitListsSet)):
            return False
        elif len(self) != self._splitListsLength:
            return False
        else:
            return True