OneSignal\Notifications::cancel PHP Method

cancel() public method

Application authentication key and ID must be set.
public cancel ( string $id ) : array
$id string Notification ID
return array
    public function cancel($id)
    {
        $url = '/notifications/' . $id . '?app_id=' . $this->api->getConfig()->getApplicationId();
        return $this->api->request('DELETE', $url, ['Authorization' => 'Basic ' . $this->api->getConfig()->getApplicationAuthKey()]);
    }