## 📚 Documentation <!-- See https://scitools-iris.readthedocs.io/en/latest/ --> <!-- Describe the issue or provide a suggestion for improving the Iris documentation --> **This work is to be performed on the [`FEATURE_index_set`](https://github.com/SciTools/iris/tree/FEATURE_index_set) feature branch.** The final piece of work once all other #6120 subtasks have been completed. There are some existing `# TODO` comments in the code that will need removing.
📚 Documentation
This work is to be performed on the
FEATURE_index_setfeature branch.The final piece of work once all other #6120 subtasks have been completed.
There are some existing
# TODOcomments in the code that will need removing.