Creator used to create copy classes. Subclass to implement create() method to return object used for copying.
Implemented in makVrf::DtSpawnSinkEnvironmentalPointCopyObjectCreator, makVrf::DtAggregateCopyObjectCreator, makVrf::DtEntityCopyObjectCreator, makVrf::DtEnvironmentalShapeCopyObjectCreator, and makVrf::DtEnvironmentalPointCopyObjectCreator.