Yes, it might work. Here is the saveIndicator method.
saveIndicator : function (name, ignoreExists) {
    this._indicators = this._indicators || {};

    if (ignoreExists && this._indicators[name || "default"]) {
        return;
    }

    var holder = this._indicators[name || "default"] || {};
    holder.indicatorText = this.indicatorText;
    holder.indicatorCls = this.indicatorCls;
    holder.indicatorIconCls = this.indicatorIconCls;
    holder.indicatorTip = this.indicatorTip;

    this._indicators[name || "default"] = holder;
}