00001 import FWCore.ParameterSet.Config as cms 00002 00003 # import CMS geometry 00004 from Configuration.StandardSequences.Geometry_cff import XMLIdealGeometryESSource 00005 00006 # add our custom detector grouping to DDD 00007 XMLIdealGeometryESSource.geomXMLFiles.extend(['SimTracker/TrackerMaterialAnalysis/data/trackingMaterialGroups.xml'])