@query_params('allow_no_indices', 'expand_wildcards', 'ignore_unavailable',
        'only_ancient_segments', 'wait_for_completion')
    def upgrade(self, index=None, params=None):
        return self.transport.perform_request('POST', _make_path(index,
            '_upgrade'), params=params)
Flush Database
dataset/ETHPy150Open elastic/elasticsearch-py/elasticsearch/client/indices.py/IndicesClient.upgrade--crossover with--dataset/ETHPy150Open refinery29/chassis/chassis/test/services/cache_test.py/CacheTest.tearDown