public function createBankAccount(
        $name,
        $account_number,
        $routing_number,
        $type,
        $meta = null
        )
    {
        return $this->bank_accounts->create(array(
            'name'           => $name,
            'account_number' => $account_number,
            'routing_number' => $routing_number,
            'type'           => $type,
            'meta'           => $meta
            ));
    }