def or_where_exists(self, query, negate=False):
        return self.where_exists(query, 'or', negate)
Override for notification when fetchOverview() action fails
dataset/ETHPy150Open sdispater/orator/orator/query/builder.py/QueryBuilder.or_where_exists--crossover with--dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/news/nntp.py/NNTPClient.getOverviewFailed