Problem/Motivation
Add comments explaining why the constructs added in [#] are used, which was done for performance. See #3017710-50: Drupal\Core\TypedData\TypedData::getPropertyPath() is slow
This is a follow up to #3017710: Drupal\Core\TypedData\TypedData::getPropertyPath() is slow
Steps to reproduce
Proposed resolution
Add comments to prevent regression
Remaining tasks
Better title?
Patch
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