function getCurrentData() {
    let currentData = storage.getDataByKey(savedDataKey);

    if (!currentData) {
        let chartType = getCurrentType();
        let {initialDataType} = defaultConfig[chartType];

        currentData = defaultData[chartType][initialDataType];

        storage.setDataByKey(savedDataKey, currentData);
    }

    return currentData;
}
Gets the current data either from the store or from the data file.
If no data is found on the store, one is set from the data file.
@return {Object}     Data object [data is parsed before it is set]