ActsTrk::HitCountsPerTrack Node1 ActsTrk::HitCountsPerTrack - m_counts + countsPerTruthParticle() + countsPerTruthParticle() + totalCounts() + totalCounts() + noiseCounts() + noiseCounts() Node2 std::array< ActsTrk ::HitCounterArray, kNRecoCounts > Node2->Node1 -m_recoCounts Node3 ActsTrk::HitCounterArray + HitCounterArray() Node3->Node2 +elements Node4 std::array< uint8_t, NHitCounter > Node4->Node3 Node5 T Node5->Node4 +elements