text: import FWCore.ParameterSet.Config as cms
  
  XMLIdealGeometryESSource = cms.ESSource("XMLIdealGeometryESSource",
                                          geomXMLFiles = cms.vstring('Geometry/CMSCommonData/data/normal/cmsextent.xml', 
                                                                     'Geometry/CMSCommonData/data/cms.xml', 
                                                                     'Geometry/CMSCommonData/data/cmsMagneticField.xml', 
                                                                     'MagneticField/GeomBuilder/data/MagneticFieldVolumes_160812_1.xml',
                                                                     'Geometry/CMSCommonData/data/materials.xml'),
                                          rootNodeName = cms.string('cms:MCMS')
                                          )
  