MuonValR4::DynamicLegend Node1 MuonValR4::DynamicLegend   + DynamicLegend() + DynamicLegend() + addOnce() + empty() + release() Node2 std::bitset< static _cast< std::size_t > (LegendItem::NumItems)>     Node2->Node1 -m_entries Node3 std::unique_ptr< TLegend > + ptr + operator->() Node3->Node1 -m_legend