wp-includes/class-wp-comment.php:325Gets a child comment by ID.
$child_idintWP_Comment|false public function get_child( $child_id ) { return $this->children[ $child_id ] ?? false; }Introduced in 4.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-comment.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.