Method dataToJson

src/Atte.cpp:119–123

	}

	json_t* dataToJson() override {
		json_t* rootJ = json_object();
		json_object_set_new(rootJ, "normalledVoltageIdx", json_integer(normalledVoltageIdx));
		return rootJ;
	}

	void dataFromJson(json_t* rootJ) override {
		json_t* normalledVoltageIdxJ = json_object_get(rootJ, "normalledVoltageIdx");