@Override
    public String toString() {
        return "(" + getF1() + "," + getF2() + "," + getF3() + "," + getF4() + ")";
    }
<p>Returns a String representation of this triple using the format {@code ($f1,$f2,$f3,$4)}.</p>

@return a string describing this object, not null
inlong-manager/manager-common/src/main/java/org/apache/inlong/manager/common/tool/excel/tuple/Quartet.java