function getConfig(path) {
        var userConfig = ariaModel.get(path);
        if (userConfig == null) {
            var pathArr = path.split('.');
            var result = lang.aria;
            for (var i = 0; i < pathArr.length; ++i) {
                result = result[pathArr[i]];
            }
            return result;
        }
        else {
            return userConfig;
        }
    }
@private
@type {
    [handlerUID: string]: {
        seriesTaskMap?: {
            [seriesUID: string]: Task
        },
        overallTask?: Task
    }
}