def fetchOverview(self):
        self.sendLine('LIST OVERVIEW.FMT')
        self._newState(self._stateOverview, self.getOverviewFailed)
Return a generator containing all the elements with key property equal 
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/news/nntp.py/NNTPClient.fetchOverview--crossover with--dataset/ETHPy150Open espeed/bulbs/bulbs/rexster/index.py/Index.lookup