public String getName() {
        return name;
    }
Second downsampling is not for metrics, but for record, profile and top n. Those are details but don't do
aggregation, and still merge into day level in the persistence.
test/e2e-v2/java-test-service/e2e-mock-baseline-server/src/main/java/org/apache/skywalking/e2e/DownSampling.java