Missing docstrings

[doctrino]

Description

Please describe the change you have made.

Checklist:

• [ ] Tests added/updated.
• [ ] Documentation updated. Documentation is generated from docstrings - these must be updated according to your change. If a new method has been added it should be referenced in cognite.rst in order to generate docs based on its docstring.
• [ ] Changelog updated in CHANGELOG.md.
• [ ] Version bumped. If triggering a new release is desired, bump the version number in _version.py and pyproject.toml per semantic versioning.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 92.30769% with 1 line in your changes missing coverage. Please review.

Project coverage is 92.68%. Comparing base (2e0e665) to head (5de291b).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1833 +/- ## ========================================== - Coverage 92.73% 92.68% -0.06% ========================================== Files 122 122 Lines 18188 18200 +12 ========================================== + Hits 16866 16868 +2 - Misses 1322 1332 +10 ``` | [Files](https://app.codecov.io/gh/cognitedata/cognite-sdk-python/pull/1833?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cognitedata) | Coverage Δ | | |---|---|---| | [cognite/client/\_version.py](https://app.codecov.io/gh/cognitedata/cognite-sdk-python/pull/1833?src=pr&el=tree&filepath=cognite%2Fclient%2F_version.py&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cognitedata#diff-Y29nbml0ZS9jbGllbnQvX3ZlcnNpb24ucHk=) | `100.00% <100.00%> (ø)` | | | [cognite/client/\_api/data\_modeling/instances.py](https://app.codecov.io/gh/cognitedata/cognite-sdk-python/pull/1833?src=pr&el=tree&filepath=cognite%2Fclient%2F_api%2Fdata_modeling%2Finstances.py&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cognitedata#diff-Y29nbml0ZS9jbGllbnQvX2FwaS9kYXRhX21vZGVsaW5nL2luc3RhbmNlcy5weQ==) | `88.14% <91.66%> (+0.37%)` | :arrow_up: | ... and [4 files with indirect coverage changes](https://app.codecov.io/gh/cognitedata/cognite-sdk-python/pull/1833/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cognitedata)