[GitHub] [incubator-echarts] tteat opened a new issue #11446: 请问树图可以设置成一层一层自动展开吗？

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tteat opened a new issue #11446: 请问树图可以设置成一层一层自动展开吗？
URL: https://github.com/apache/incubator-echarts/issues/11446
 
 
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   我看代码里是控制node.depth，请问有开放出来的api吗？

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