tree 控件及TreeSelect是否可以增加一个类似table的childrenColumnName的参数

[DinoRun]

• I have searched the issues of this repository and believe that this is not a duplicate.

What problem does this feature solve?

一般请求到的数据可能不是使用children作为对象的键，有了这个功能就可以像table一样，不用手动把对象的键改成children；

What does the proposed API look like?

ant design 1.3.9

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