PyAlgorithmExample.PyCompositeParticle Node1 PyAlgorithmExample.PyComposite Particle - __l + __init__() + add() + __len__() + __getitem__() + __iter__() + __contains__() + append() + extend() + count() + index() Node3 PyAlgorithmExample.Z + __init__() + dr() Node1->Node3 Node2 g::CompositeParticle Node2->Node1