class XX {
    // @:isVar public var factorMap(default, null):Map<String, Range>;
    @:isVar public var factorValueMap(default, null):Map<String, Int>;
    @:isVar public var reducers(default, null):Map<String, Float>;

    public function addFactor(indent:String, range:Range, getReducer:Range->Int->Float) {
        // this.factorMap[indent] = range;
        this.factorValueMap[indent] = Random.getIn(range.from, range.to);
        this.reducers[indent] = getReducer(range, this.factorValueMap[indent]);
    }

    public function pipe(outIndent:String, factorIdent:String, range:Range, weight:Int, ?getReducer:Range->Int->Float) {
        this.factorValueMap[outIndent] = Math.round((this.reducers[factorIdent] * weight) * range.to);
        this.reducers[outIndent] = getReducer(range, this.factorValueMap[outIndent]);
    }
}