G4UA::CelerOffloadTool Node1 G4UA::CelerOffloadTool - m_geometry_output_file - m_max_num_tracks - m_max_steps - m_max_step_iters - m_initializer_capacity - m_ignore_processes - m_cuda_stack_size - m_cuda_heap_size - m_action_times + CelerOffloadTool() + initialize() + finalize() # makeAndFillAction() Node2 G4UA::UserActionToolBase < CelerOffload > # m_actions + UserActionToolBase() + fillUserAction() + BeginOfAthenaEvent() + EndOfAthenaEvent() # makeAndFillAction() Node2->Node1 Node3 extends< AthAlgTool, IUserActionTool >     Node3->Node2