@Override
    public boolean combine(Metrics metrics) {
        this.isCalculated = false;

        PercentileMetrics2 percentileMetrics = (PercentileMetrics2) metrics;
        this.dataset.append(percentileMetrics.dataset);
        return true;
    }
Replace the deprecated {@link PercentileMetrics}.
Calculate the multiple P50/75/90/95/99 values once for all
and store the result in the format: `{p=50},value1|{p=75},value2|{p=90},value3|{p=95},value4|{p=99},value5`.

@since 10.0.0
oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/metrics/PercentileMetrics2.java