EL::IWorker Node1 EL::IWorker + addOutputList() + getOutputFile() + getOutputFileNull() + metaData() + tree() + treeEntry() + inputFile() + inputFileName() + triggerConfig() + xaodEvent() + xaodStore() + getAlg() + skipEvent() Node2 EL::IFilterWorker + ~IFilterWorker() + filterPassed() + setFilterPassed() Node2->Node1 Node3 EL::IHistogramWorker + ~IHistogramWorker() + addOutput() + getOutputHist() Node3->Node1 Node4 EL::ITreeWorker + ~ITreeWorker() + addTree() + getOutputTree() Node4->Node1