AthCUDA::HostMemoryResourceTool Node1 AthCUDA::HostMemoryResourceTool   + initialize() + mr() * initialize() * mr() Node2 extends< AthAlgTool, AthDevice::IMemoryResource Tool >     Node2->Node1 Node3 std::unique_ptr< std ::pmr::memory_resource > + ptr + operator->() Node3->Node1 -m_mr