@Override
    public void process(MetricsPacket.Builder builder) {
        Set<DimensionId> dimensionsToRetain = builder.getDimensionIds();
        dimensionsToRetain.removeAll(blocklistDimensions);
        builder.retainDimensions(dimensionsToRetain);
    }
Ensures that blocklisted dimensions are removed from the metric set

@author gjoranv
metrics-proxy/src/main/java/ai/vespa/metricsproxy/http/application/PublicDimensionsProcessor.java