private int[] createReorderedIndices() {
        int childCount = getChildCount();
        List<Order> orders = createOrders(childCount);
        return sortOrdersIntoReorderedIndices(childCount, orders);
    }
Create an array, which indicates the reordered indices that {@link LayoutParams#order}
attributes are taken into account.

@return @return an array which have the reordered indices
common/src/main/java/com/sxjs/common/widget/flexboxlayout/FlexboxLayout.java