How do I expand all directories in a node recursively in neotree?

What happened?

If I am at a directory/node, I would like a key sequence to expand all directories under that node so I can see all the files. How can I do this?

What did you expect to happen?

I found this pull request Open a directory recursively? · Issue #102 · jaypei/emacs-neotree · GitHub but the suggested key sequence (0) does not work for me.

System information

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