python.samplers.ParticleSampler Node1 python.samplers.Particle Sampler + pid + mom + n + pos + massdict + mass_override - _pid - _n + __init__() + pid() + pid() + n() + n() + shoot() Node2 python.samplers.Sampler + shoot() + __call__() Node2->Node1 Node3 object Node3->Node2