pharo
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Bug fix + code cleanup for issue #11705: Error: Instances of RBProtocolEnvironment are not indexable
issue #11705
This is commited against Pharo10, I can not change to Pharo11 strangely.
(we have to fix Pharo11 first, we then can backport later if it is important)
I did a PR for Pharo11: #11708
We can merge that first and if it works fine, we ca merge the "backport"