can someone show me function insert_id(); in codeinger4 ?

https://codeigniter4.github.io/CodeIgnit...b-insertid

i use insertId follow above link it info

Call to undefinedmethod CodeIgniter\Database\MySQLi\Builder::insertID() 
Call to undefined method CodeIgniter\Database\MySQLi\Builder::insertID()

PHP Code:

public function Add($table,$data){
        if(isset($data) && $data != NULL){
            $builder = $this->db->table($table);
            $builder->insert($data);
            return $builder->insertID();
        }
    }