Method DescribeNegationTo

tests/gtest/gtest.h:9458–9461

      UniversalPrint(Unwrap(rhs_), os);
    }
    void DescribeNegationTo(::std::ostream* os) const override {
      *os << D::NegatedDesc() <<  " ";
      UniversalPrint(Unwrap(rhs_), os);
    }

   private:
    Rhs rhs_;