使用treeData属性的directory-tree无法正确使用shift全选

[qq792453582]

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

Version

1.4.10

Environment

Current ant-design-vue version: 1.4.10

Reproduction link

Steps to reproduce

var children = this.$slots['default'] || [];

如果使用treeData, default为undefined

What is expected?

使用treeData属性的directory-tree可以使用shift全选

What is actually happening?

使用treeData属性的directory-tree无法正确使用shift全选

[yf-hk]

建议如果改的话配一个选项，控制是否可以开启shift多选默认为否。我需要做的功能正好只允许单选，如果修复这个问题以后一下可以多选反而麻烦了

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[github-actions]

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