wp-includes/Requests/src/Utility/CaseInsensitiveDictionary.php:126Get an iterator for the data
ArrayIterator #[ReturnTypeWillChange] public function getIterator() { return new ArrayIterator($this->data); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/Requests/src/Utility/CaseInsensitiveDictionary.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.