Function Rcpp_unprotect

inst/include/Rcpp/protection/Shield.h:28–32

    }

    inline void Rcpp_unprotect(int i){
        // Prefer this function over UNPROTECT() in Rcpp so that all
        // balance checks errors by rchk are contained at one location (#892)
        UNPROTECT(i);
    }

    template <typename T>
    class Shield{