if the macro is called from other libraries this variable might be set and should be used for consistency

Implement dd4hep::Tube using TGeoTubeSeg (See also Issue https://github.com/AIDASoft/DD4hep/issues/203)

Implement dd4hep::Tube using TGeoTubeSeg (See also Issue https://github.com/AIDASoft/DD4hep/issues/203)

Separate placement calls in the VolumeManager and distinguish between DetElement placements and Volume placements (currently unused)

DetectorData: Warn if a second object (e.g., constant) is created, as insert will not overwrite the existing one