if (prefix == null) {
            throw new IllegalArgumentException("Null 'prefix' argument.");
        }
        if (seriesParameterName == null) {
            throw new IllegalArgumentException(
                    "Null 'seriesParameterName' argument.");
        }
        if (itemParameterName == null) {
            throw new IllegalArgumentException(
                    "Null 'itemParameterName' argument.");
        }
        this.prefix = prefix;
        this.seriesParameterName = seriesParameterName;