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/pull/3598#issuecomment-562332357,https://api.github.com/repos/pydata/xarray/issues/3598,562332357,MDEyOklzc3VlQ29tbWVudDU2MjMzMjM1Nw==,2448579,2019-12-05T21:44:31Z,2019-12-05T21:44:31Z,MEMBER,"> But I believe we assume that when all the values in dependencies are themselves keys of layers. 

I came to the same conclusion when I looked at it but didn't know if this was by accident or design. The docs don't say anything.

anyway the fix looks good. Thanks for tackling this.

I'll merge tomorrow if there are no other comments.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,533555794