wp-includes/SimplePie/src/File.php:343$namestring$value public function with_header(string $name, $value) { $this->maybe_update_headers(); $new = clone $this; $newHeader = [ strtolower($name) => (array) $value, ]; $new->set_headers($newHeader + $this->get_headers()); return $new; }Unchanged from 6.9.7 through 7.1.0.
Signature, return type and hooks compared across 3 parsed releases.
src/wp-includes/SimplePie/src/File.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.