def METHOD_NAME(self):
    super(PileUpAnalyzer, self).METHOD_NAME()
    self.mchandles['pusi'] =  AutoHandle(
        'slimmedAddPileupInfo',
        'std::vector<PileupSummaryInfo>',
        fallbackLabel="addPileupInfo"
        ) 
    if self.allVertices == '_AUTO_':
        self.handles['vertices'] =  AutoHandle( "offlineSlimmedPrimaryVertices", 'std::vector<reco::Vertex>', fallbackLabel="offlinePrimaryVertices" ) 
    else:
        self.handles['vertices'] =  AutoHandle( self.allVertices, 'std::vector<reco::Vertex>' ) 