Method save

flow/include/flow/flat_buffers.h:1139–1146

	template <class U, class Writer, typename = std::enable_if_t<is_scalar<U>>>
	auto save(const U& message, Writer& writer, const VTableSet*) {
		constexpr auto size = scalar_traits<U>::size;
		std::array<uint8_t, size> result = {};
		if constexpr (size > 0) {
			scalar_traits<U>::save(&result[0], message, this->context());
		}
		return result;
	}

	template <class U, class Writer>
	auto save(const U& message,