Method ~PreserveStorage

inst/include/Rcpp/storage/PreserveStorage.h:33–37

        PreserveStorage() : data(R_NilValue), token(R_NilValue){}

        ~PreserveStorage(){
            Rcpp_PreciousRelease(token) ;
            data = R_NilValue;
            token = R_NilValue;
        }

        inline void set__(SEXP x){
            if (data != x) {