private void setWillNotDrawFlag() {
        if (mDividerDrawableHorizontal == null && mDividerDrawableVertical == null) {
            setWillNotDraw(true);
        } else {
            setWillNotDraw(false);
        }
    }
Set how horizontal dividers should be shown between items in this layout.

@param dividerMode One or more of {@link #SHOW_DIVIDER_BEGINNING},
                   {@link #SHOW_DIVIDER_MIDDLE}, or {@link #SHOW_DIVIDER_END},
                   or {@link #SHOW_DIVIDER_NONE} to show no dividers.
@see #setShowDivider(int)
common/src/main/java/com/sxjs/common/widget/flexboxlayout/FlexboxLayout.java