}

    @LazyInit private volatile @Nullable BaseEncoding upperCase;
    @LazyInit private volatile @Nullable BaseEncoding lowerCase;
    @LazyInit private volatile @Nullable BaseEncoding ignoreCase;

    @Override
    public BaseEncoding upperCase() {
      BaseEncoding result = upperCase;
      if (result == null) {
        Alphabet upper = alphabet.upperCase();

    }

    private static final Logger logger = LogManager.getLogger(OpenIdConnectAuthenticator.class);

    private static final BaseEncoding BASE64_DECODER = BaseEncoding.base64().withSeparator("\n", 64);

    private static final BaseEncoding BASE64URL_DECODER = BaseEncoding.base64Url().withSeparator("\n", 64);

    /** Configuration key for OpenID Connect authorization server URL. */

import org.opensearch.search.aggregations.Aggregations;
import org.opensearch.search.aggregations.bucket.filter.Filter;
import org.opensearch.search.aggregations.bucket.terms.Terms;

import com.google.common.io.BaseEncoding;

/**
 * Response object for faceted search results containing query counts and field facets.
 * This class processes OpenSearch aggregations to provide structured facet information

import org.opensearch.transport.client.Client;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.io.BaseEncoding;

import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;

/**
 * Client for interacting with OpenSearch search engine.