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/1982#issuecomment-612137754,https://api.github.com/repos/pydata/xarray/issues/1982,612137754,MDEyOklzc3VlQ29tbWVudDYxMjEzNzc1NA==,23484003,2020-04-10T17:38:50Z,2020-04-10T17:38:50Z,NONE,"I'm currently working around this by loading the root group & the branch group with two separate calls and then merging the resulting datasets.  It's ugly b/c I have to manually associate the 'phony_dim_x' dimensions from one group with the other.  

Maybe I can find the time during quarantine to make an attempt at resolving  #1092, which I think would facilitate resolving this issue as well.

Another option would be to allow the `group` kwarg to be a tuple of group names, and `load_dataset` could yield a (flat) `Dataset` including both the root and the branch variables. 
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