Trk::IParticleCaloExtensionTool Node1 Trk::IParticleCaloExtensionTool + caloExtension() + caloExtension() + caloExtension() + caloExtensionCollection() + caloExtension() + caloSurfacesFromLayers() + surfaceCaloExtension() + layersCaloExtension() + interfaceID() Node2 IAlgTool Node2->Node1