/**
     * The auto expand replicas for doc.
     */
    @Size(max = 10)
    public String autoExpandReplicasForDoc = ComponentUtil.getFessConfig().getIndexAutoExpandReplicas();

    /**
     * The flag to load bulk data during config index rebuild.
     */
    @Size(max = 10)
    public String loadBulkData;

    /**
     * The flag to rebuild fess_config indices.

            return "100";
        }

        @Override
        public String getIndexNumberOfShards() {
            return "1";
        }

        @Override
        public String getIndexAutoExpandReplicas() {
            return "0-1";
        }
    }

        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        return createIndex(index, indexName, fessConfig.getIndexNumberOfShards(), fessConfig.getIndexAutoExpandReplicas(), true);
    }

    /**
     * Creates a new index with specified settings.
     *
     * @param index              the index configuration name