Method write_number_with_ubjson_prefix

Source/Utils/json.hpp:13988–13996

            template<typename NumberType, typename std::enable_if<
                std::is_floating_point<NumberType>::value, int>::type = 0>
                void write_number_with_ubjson_prefix(const NumberType n,
                    const bool add_prefix)
            {
                if (add_prefix)
                {
                    oa->write_character(get_ubjson_float_prefix(n));
                }
                write_number(n);
            }

            // UBJSON: write number (unsigned integer)
            template<typename NumberType, typename std::enable_if<