V4 how to check existings of a Index

On v3 there was:

```php
$searchIndex = $client->initIndex($name);
$searchIndex->exists();
```

I could not find a existIndex method on v4 client version?

## Workaround

```php
try {
    $client->getSettings($indexName);
} catch (NotFoundException) {
    return false;
}

return true;
```