Remarks:
Transformation computation is ambiguous:
Either the old magnet is correct or the upgrade magnet.
See src/plugins/CondDB2DDDB.cpp apply_trafo(....)
To show the display:
$> geoPluginRun -destroy \
-plugin DDDB_Executor -loader DDDB_FileReader \
-params file:/tmp/frankm/DDDB/Parameters.xml \
-vis -attr file:/tmp/frankm/DDDB/Visattrs.xml \
-input file:/tmp/frankm/DDDB/DDDB/lhcb.xml \
-config DD4hep_ConditionsManagerInstaller
Optional:
-config DD4hep_XMLLoader file:checkout/examples/DDDB/data/Debug.xml
