Note that this is not mandatory to be identical, but it makes the things easier during the configuration restore process, which is described in the next section.

注意，不一定要与现有安装完全相同，但是这样做会 简化配置恢复过程（配置恢复过程将在下一节介绍）。

Note that the first two code blocks within the new function are almost identical to those in the original.

注意，新函数中的前两个代码块与原来函数几乎相同。

Note that the syntax of using the $treeFarm context attribute reference is identical to the $treeList variable reference examined earlier.

要注意，使用 $treeFarm上下文属性引用的方法和前面分析的 $treeList变量引用一致。