html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/4660#issuecomment-763427539,https://api.github.com/repos/pydata/xarray/issues/4660,763427539,MDEyOklzc3VlQ29tbWVudDc2MzQyNzUzOQ==,47473455,2021-01-20T08:27:01Z,2021-01-20T08:27:01Z,NONE,"Sorry for my long time to reply, christmas...
@keewis thank you a lot for your anwer, I am glad to hear subclass might be supported one day. At the end, those are the python tools the programmers we work with.

For the moment, I will try to implement [Extending xarray](https://xarray.pydata.org/en/stable/internals.html#extending-xarray) as you pointed using ""xr.register_dataset_accessor"". Create a new class that cannot be identified as 'isinstance(object, xarray.Dataset)' might be an issue in my case. 

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