Folding not folding

[suuuehgi]

Summary

I can't get vim-like folding to work. I just want to collapse/fold a indented section, not the whole cell.
Can someone explain to me how this is supposed to work?

Environment

• Operating system : Arch Linux
• Web browser : Firefox 65.0.1
• Version or revision of Jupyter Notebook : 4.4.0
• Revision of jupyter-vim-binding : (e.g. c9822c7)

Behavior

The collapse key combinations don't seem to effect anything for me

Expected

Fold by indent by pressing zA.

Actual

Nothing.

Step by step procedure

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What you have done to solve the issue

• I can't find any documentation about it besides the commit
• I get Unknown option: foldmethod by setting manually.

Remarks

Thanks a lot for any help!

[lambdalisue]

While CodeMirror's Vim does not support folding, this plugin does not support folding as well.