Description
I'm using the federated multi-search feature of Meilisearch. I use the code example from the docs:

$client->multiSearch([
    (new SearchQuery())
      ->setIndexUid('movies'))
      ->setQuery('batman'),
    (new SearchQuery())
      ->setIndexUid('comics')
      ->setQuery('batman'),
  ],
  (new MultiSearchFederation())
);

However, this results in the following error:

This error only appears when I pass an empty MultiSearchFederation() instance, like in the docs. The error does not appear when I set a property of MultiSearchFederation, like (new MultiSearchFederation())->setLimit(limit: 100).

Possible solution
See my PR