magento2 container的默認分佈

<container name="root">
    <container name="after.body.start"/>
    <container name="page.wrapper">
        <container name="global.notices"/>
        <container name="header.container"/>
        <container name="page.top"/>
        <container name="main.content">
            <container name="columns.top"/>
            <container name="columns">
                <container name="main"/>
                <container name="div.sidebar.main">
                    <container name="sidebar.main"/>
                </container>
                <container name="div.sidebar.additional">
                    <container name="sidebar.additional"/>
                </container>
            </container>
        </container>
        <container name="page.bottom.container"/>
        <container name="footer-container"/>
        <container name="before.body.end"/>
    </container>
</container>

添加BLOCK時不知道該添加到那個container下，有個簡化的XML就比較容易找位置。