InputParameters validParams<OutputInterface>() { InputParameters params = emptyInputParameters(); params.addParam<std::vector<OutputName>>("outputs", "Vector of output names were you would like " "to restrict the output of variables(s) " "associated with this object"); params.addParamNamesToGroup("outputs", "Advanced"); std::set<std::string> reserved = {"all", "none"}; params.setReservedValues("outputs", reserved); return params; }