pydata
support `chunks` in `open_groups` and `open_datatree`
In trying to support chunks the way we do for open_dataset I had to add a lot of parameters to the top-level open_datatree and open_groups functions.
I'm also still looking for the equivalent of _protect_dataset_variables_inplace, and finally _dataset_from_backend_dataset has been the place to call set_close, while #9651 pushed this to the backends for datatree.
No tests yet, and I also want to improve the docstrings before merging.
(the chunked array methods – chunk, load, compute, and persist – should be a separate PR)
- [ ] complete docstrings
- [ ] Tests added
cc @TomNicholas, @shoyer
I've copied over the docstring of open_dataset to open_groups and open_datatree and changed the code of _datatree_from_backend_datatree to both copy over _close and to protect the data against modifications. Which means this should be ready for another round of reviews and possibly merging.
