Internally, xcube multi-level datasets should be represented as a `xarray.DataTree` with each resolution level as a sub-group. Once https://github.com/xcube-dev/xcube/issues/1123 is in place, adjust applicable rules.
Internally, xcube multi-level datasets should be represented as a
xarray.DataTreewith each resolution level as a sub-group.Once xcube-dev/xcube#1123 is in place, adjust applicable rules.