};

        // Setup WebApiManagerFactory that returns null
        WebApiManagerFactory factory = new WebApiManagerFactory() {
            @Override
            public WebApiManager get(HttpServletRequest req) {
                assertSame(request, req);
                return null;
            }
        };
        ComponentUtil.register(factory, "webApiManagerFactory");

        // Execute

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.crypto.CachedCipher;
import org.codelibs.core.misc.DynamicProperties;
import org.codelibs.fess.api.WebApiManagerFactory;
import org.codelibs.fess.auth.AuthenticationManager;
import org.codelibs.fess.chat.ChatClient;
import org.codelibs.fess.chat.ChatSessionManager;
import org.codelibs.fess.cors.CorsHandlerFactory;

    /**
     * Default constructor.
     */
    public ChatApiManager() {
        // Default constructor
    }

    /**
     * Registers this API manager with the WebApiManagerFactory.
     */
    @PostConstruct
    public void register() {
        if (logger.isInfoEnabled()) {
            logger.info("Registering ChatApiManager");
        }