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
2141447815,I_kwDOAMm_X85_o-aH,8768,`xarray/datatree_` missing in 2024.2.0 sdist,110765,closed,0,,,15,2024-02-19T03:57:31Z,2024-04-23T18:11:58Z,2024-04-23T15:35:21Z,CONTRIBUTOR,,,,"### What happened?

Apparently `xarray-2024.2.0` requires `xarray.datatree_` module but this module isn't included in sdist tarball.

### What did you expect to happen?

_No response_

### Minimal Complete Verifiable Example

```Python
$ tar -tf /tmp/dist/xarray-2024.2.0.tar.gz  | grep datatree_
(empty)
```


### MVCE confirmation

- [ ] Minimal example — the example is as focused as reasonably possible to demonstrate the underlying issue in xarray.
- [ ] Complete example — the example is self-contained, including all data and the text of any traceback.
- [ ] Verifiable example — the example copy & pastes into an IPython prompt or [Binder notebook](https://mybinder.org/v2/gh/pydata/xarray/main?urlpath=lab/tree/doc/examples/blank_template.ipynb), returning the result.
- [ ] New issue — a search of GitHub Issues suggests this is not a duplicate.
- [ ] Recent environment — the issue occurs with the latest version of xarray and its dependencies.

### Relevant log output

_No response_

### Anything else we need to know?

_No response_

### Environment

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