id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
1000769524,PR_kwDOAMm_X84r9AaW,5802,BUG: xarray.backends.plugins.get_backend: fix passing in a backend directly,2129135,closed,0,,,6,2021-09-20T09:47:34Z,2021-09-20T20:35:09Z,2021-09-20T11:07:03Z,NONE,,0,pydata/xarray/pulls/5802,"The `open_dataset` and `open_mfdataset` functions allow a user to pass
in a (custom) backend directly. This was however not functioning.

Selecting an engine with a string was functioning as expected, however,
passing in a backend class directly failed.

An instance of the backend is now created. A test has been added, as
well as some type hints.

<!-- Feel free to remove check-list items aren't relevant to your change -->

- [ ] Closes #xxxx
- [x] Tests added
- [ ] Passes `pre-commit run --all-files`
- [ ] User visible changes (including notable bug fixes) are documented in `whats-new.rst`
- [ ] New functions/methods are listed in `api.rst`
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