this.lastResolver = resolver;
            this.resolverCalled = true;
        }

        @Override
        public ActionResponse getResponse(SsoResponseType responseType) {
            return responseMap.get(responseType);
        }

        @Override
        public String logout(FessUserBean userBean) {
            this.lastLogoutUser = userBean;
            return logoutUrl;
        }
    }

     * for metadata or logout operations, so this method returns null.
     *
     * @param responseType The type of SSO response requested
     * @return Always returns null for SPNEGO authentication
     */
    @Override
    public ActionResponse getResponse(final SsoResponseType responseType) {
        return null;
    }

    /**
     * Performs logout for the specified user.
     *

        public void resolveCredential(LoginCredentialResolver resolver) {
            // Not used in these tests
        }

        @Override
        public ActionResponse getResponse(SsoResponseType responseType) {
            return actionResponse;
        }

        @Override
        public String logout(FessUserBean user) {
            return logoutUrl;
        }
    }

     */
    public void setMaxGroupDepth(final int maxGroupDepth) {
        this.maxGroupDepth = maxGroupDepth;
    }

    @Override
    public ActionResponse getResponse(final SsoResponseType responseType) {
        return null;
    }

    @Override
    public String logout(final FessUserBean user) {
        return null;
    }

    /**
     * Enable to use V2 endpoint.