wp-includes/class-wp-query.php:3937Rewinds the comments, resets the comment index and comment to first.
public function rewind_comments() { $this->current_comment = -1; if ( $this->comment_count > 0 ) { $this->comment = $this->comments[0]; } }Introduced in 2.2.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-query.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.