SuggestSettingsBuilder result = builder.addInitialSettings("key1", "value1");
        assertEquals(builder, result); // Test method chaining
        assertEquals(1, builder.initialSettings.size());
        assertEquals("value1", builder.initialSettings.get("key1"));

        // Test adding multiple settings
        builder.addInitialSettings("key2", 100);
        builder.addInitialSettings("key3", true);

    /**
     * Adds an initial setting.
     * @param key The key of the setting.
     * @param value The value of the setting.
     * @return This builder instance.
     */
    public SuggestSettingsBuilder addInitialSettings(final String key, final Object value) {
        initialSettings.put(key, value);
        return this;
    }

    /**
     * Sets the scroll timeout.
     * @param timeout The scroll timeout.

                .execute()
                .actionGet(fessConfig.getIndexHealthTimeout());

        final SuggestSettingsBuilder settingsBuilder = SuggestSettings.builder();
        settingsBuilder.addInitialSettings("search_engine.type", fessConfig.getFesenType());
        settingsBuilder.bulkTimeout(fessConfig.getIndexBulkTimeout());
        settingsBuilder.clusterTimeout(fessConfig.getIndexHealthTimeout());