Improve avoid shadowing lint, by only triggering when the shadowed variables are both used.

[Luro02]

Summary

The lint should only trigger when both the shadowed variable and the variable that shadows it are used in the same method.

Alternative: Check how fields are referenced in other methods. If they are referenced by this. everywhere, then it is not that confusing to introduce a parameter/variable with the same name. Otherwise it could be confused.

Lint Name

AVOID_SHADOWING

Reproducer

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