// Create second index and add to same alias
        client.admin().indices().prepareCreate(index2).execute().actionGet();
        client.admin().indices().prepareAliases().addAlias(index2, aliasName).execute().actionGet();

        final Suggester suggester = Suggester.builder().build(client, "test");

        // Use reflection to access private method

            final IndicesAliasesRequestBuilder aliasesRequestBuilder =
                    client.admin().indices().prepareAliases().addAlias(indexName, getUpdateAlias(index));
            for (final String prevIndex : prevIndices) {
                aliasesRequestBuilder.removeAlias(prevIndex, getUpdateAlias(index));
            }

            final File aliasConfigDir = ResourceUtil.getResourceAsFile(aliasConfigDirPath);
            if (aliasConfigDir.isDirectory()) {
                final IndicesAliasesRequestBuilder builder = client.admin().indices().prepareAliases();
                stream(aliasConfigDir.listFiles((dir, name) -> name.endsWith(".json"))).of(stream -> stream.forEach(f -> {
                    String aliasName = f.getName().replaceFirst(".json$", "");