Monitored::LiveHistogramProvider Node1 Monitored::LiveHistogram Provider - m_gmTool - m_factory - m_histDef - m_currentHistogram - m_currentLumiBlock + LiveHistogramProvider() + histogram() + updateHistDef() + copyDataToNewHistogram() + copyDataToNewHistogram() Node2 Monitored::IHistogramProvider + ~IHistogramProvider() + histogram() Node2->Node1