FWPhysicsObjectDesc(const std::string &iName, const TClass *iClass, const std::string &iPurpose, const FWDisplayProperties &iProperties=FWDisplayProperties::defaultProperties, const std::string &iModuleLabel=std::string(), const std::string &iProductInstanceLabel=std::string(), const std::string &iProcessName=std::string(), const std::string &iFilterExpression=std::string(), unsigned int iLayer=1)