function mergeAxisOptionFromParallel(option) {
    var axes = normalizeToArray(option.parallelAxis);

    each$1(axes, function (axisOption) {
        if (!isObject$1(axisOption)) {
            return;
        }

        var parallelIndex = axisOption.parallelIndex || 0;
        var parallelOption = normalizeToArray(option.parallel)[parallelIndex];

        if (parallelOption && parallelOption.parallelAxisDefault) {
            merge(axisOption, parallelOption.parallelAxisDefault, false);
        }
    });
}
Parallel Coordinates
<https://en.wikipedia.org/wiki/Parallel_coordinates>