docs: private static boolean checkIfCollectionExists(CloudSolrClient server, String collection) throws KeeperException, InterruptedException {
          ZkStateReader zkStateReader = server.getZkStateReader();
          zkStateReader.updateClusterState(true);
          ClusterState clusterState = zkStateReader.getClusterState();
          return clusterState.getCollectionOrNull(collection) != null;
      }