下面进一步检查以确保以下两点：该组件是一个中级容器(比如XUIPanel)；这个中级容器能够包含在XUIWindow的行列网格中。

A further check is made to ensure that the component is an intermediate container (for example, an XUIPanel) and that the intermediate container fits within the XUIWindow's grid of rows and columns.

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每一个顶层的容器都会有一个内容面板，一般来说，它直接或间接地包含在顶层容器GUI中可见的组件。

Each top-level container has a content pane that, generally speaking, contains (directly or indirectly) the visible components in that top-level container's GUI.

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