Jacob Laursen f21bbc5945
[miele] Add null annotations and improve error handling robustness (#12497)
* Add null annotations and improve error handling robustness
* Fix compliancy with rule ConstantNameCheck

Fixes #12496

Signed-off-by: Jacob Laursen <jacob-github@vindvejr.dk>
2022-03-21 16:49:03 +01:00
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