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/3158#issuecomment-514004558,https://api.github.com/repos/pydata/xarray/issues/3158,514004558,MDEyOklzc3VlQ29tbWVudDUxNDAwNDU1OA==,17169544,2019-07-23T00:26:14Z,2019-07-23T00:26:14Z,CONTRIBUTOR,"A related question - `concat_dim` is a required argument in the parent function [`combine_nested`](https://github.com/pydata/xarray/blob/b3ba4ba5f9508e4b601d9cf5dbcd9024993adf37/xarray/core/combine.py#L261) (and therefore required here when `combine='nested'`).  But as `None` is a valid input, wouldn't it make more sense as an optional argument?","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,471409673