.replace("__SOURCE_INDEX__", fromIndex)//
                .replace("__SIZE__", fessConfig.getIndexReindexSize())//
                .replace("__DEST_INDEX__", toIndex);
        return reindex(fromIndex, toIndex, source, waitForCompletion);
    }

    /**
     * Performs a reindex operation with custom source configuration.
     *
     * @param fromIndex        the source index name

this._items[itemIndex]\n  }\n\n  _triggerSlideEvent(relatedTarget, eventDirectionName) {\n    const targetIndex = this._getItemIndex(relatedTarget)\n    const fromIndex = this._getItemIndex(this._element.querySelector(SELECTOR_ACTIVE_ITEM))\n    const slideEvent = $.Event(EVENT_SLIDE, {\n      relatedTarget,\n      direction: eventDirectionName,\n      from: fromIndex,\n      to: targetIndex\n    })\n\n    $(this._element).trigger(slideEvent)\n\n    return slideEvent\n  }\n\n  _setActiveIndicatorElement(element)...