DirectionalLayout没有spacing参数吗？

如想实现这样的布局，DirectionalLayout添加spacing参数，下面的Button就不用每个去设置start_margin了

<DirectionalLayout
        ohos:id="$+id:controls"
        ohos:height="100vp"
        ohos:width="match_parent"
        ohos:alignment="center"
        ohos:orientation="horizontal"
        ohos:right_margin="10vp"
        ohos:top_margin="40vp"
        >

        <Button
            ohos:id="$+id:btn_rotation"
            ohos:height="match_content"
            ohos:width="match_content"
            ohos:auto_font_size="true"
            ohos:background_element="$graphic:background_btn"
            ohos:padding="5vp"
            ohos:start_margin="10vp"
            ohos:text="$string:rotation"
            ohos:weight="1"
            />

        <Button
            ohos:id="$+id:btn_scale"
            ohos:height="match_content"
            ohos:width="match_content"
            ohos:auto_font_size="true"
            ohos:background_element="$graphic:background_btn"
            ohos:padding="5vp"
            ohos:start_margin="10vp"
            ohos:text="$string:scale"
            ohos:weight="1"
            />
....
</DirectionalLayout>