static GcGenerationAge fromName(String name) {
      return knownCollectors.getOrDefault(name, UNKNOWN);
    }
This file is modified from io.micrometer.core.instrument.binder.jvm.JvmGcMetrics
iotdb-core/metrics/interface/src/main/java/org/apache/iotdb/metrics/metricsets/jvm/JvmGcMetrics.java