VolumeBuilder Node1 VolumeBuilder # m_paramOn - m_key + VolumeBuilder() + ~VolumeBuilder() + GetKey() + SetParam() + GetParam() + Build() Node2 ExtParameterisedVolumeBuilder - m_getMatEther - m_matEther - m_matHypUr - m_G4AssemblyFactory + ExtParameterisedVolumeBuilder() + Build() + BuildAssembly() - PrintSTInfo() - getMatEther() Node1->Node2