Is it possible to fold json blocks in the output buffer with zc and zo?

[joshuahicks]

Currently, when I type zc to fold a block of code in the buffer that holds the output of an http call, I get E490: No fold found. I'm not 100% certain, but I think this may be because the file rest_nvim_results is non-modifiable. I use treesitter for folding, and I'm able to fold/unfold without issues in regular files, of all types.

Does anyone know if it is possible to enable standard vim folding functionality in the output file from this plugin? Is there a setting I can enable/disable to allow for this functionality?