当排序变量设置为true时，会按照正确的顺序将两个受影响的项目重新创建为新的树项目，旧项目将从树中删除(第51 - 67和91 - 107行)。
When the sort variable is set to true, the two affected items are recreated as new tree items in the correct order, and the old items are removed from the tree (lines 51 to 67 and 91 to 107).
在将网格的行与网格外任何类型的模型数据相关联的时候，必须要格外小心，因为网格内的行在任何时候都可被重新排序(例如，使用sort动作)。
You must be careful about correlating the rows of the grid to any type of model data outside the grid, because the rows in a grid can be reordered at any time (for example, using a sort action).
其他像是资料行排序、冻结和重新调整顺序的功能，可以让使用者以他们工作流程中最简便的方式检视资料。
Additional functionality such as column sorting, freezing, and reordering enable users to view data in the way most convenient for their workflow.
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