wp-includes/class-wp-scripts.php:789Processes items and dependencies for the head group.
string[] public function do_head_items() { $this->do_items( false, 0 ); return $this->done; }Introduced in 2.8.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-scripts.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.