private int getMarginStart(ViewGroup.MarginLayoutParams layoutParams) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            return layoutParams.getMarginStart();
        }
        return layoutParams.leftMargin;
    }
@see android.view.ViewGroup.MarginLayoutParams#getMarginStart()
turn/src/main/java/cdflynn/android/library/turn/TurnLayoutManager.java