101     Ptr<const std::vector<Real>> xstat = xrv.getStatistic();  in getConstStat()  local
102     if (xstat == nullPtr) {  in getConstStat()
103       xstat = makePtr<const std::vector<Real>>(0);  in getConstStat()
105     return xstat;  in getConstStat()
110     Ptr<std::vector<Real>> xstat = xrv.getStatistic();  in getStat()  local
111     if (xstat == nullPtr) {  in getStat()
112       xstat = makePtr<std::vector<Real>>(0);  in getStat()
114     return xstat;  in getStat()
159     Ptr<const std::vector<Real>> xstat = getConstStat(x);  in value()  local
161     Real err = quad_->error(val_-(*xstat)[0],0);  in value()
169     Ptr<const std::vector<Real>> xstat = getConstStat(x);  in gradient()  local
171     Real err = quad_->error(val_-(*xstat)[0],1);  in gradient()
183     Ptr<const std::vector<Real>> xstat = getConstStat(x);  in hessVec()  local
185     Real err1 = quad_->error(val_-(*xstat)[0],1);  in hessVec()
186     Real err2 = quad_->error(val_-(*xstat)[0],2);  in hessVec()