import org.apache.hadoop.metrics2.MetricsRecordBuilder;
import org.apache.hadoop.metrics2.impl.JmxCacheBuster;
import org.apache.hadoop.metrics2.lib.DynamicMetricsRegistry;
import org.apache.hadoop.metrics2.lib.Interns;
import org.apache.hadoop.metrics2.lib.MutableCounterLong;
<BUG>import org.apache.hadoop.metrics2.lib.MutableStat;
</BUG>
@InterfaceAudience.Private
public class MetricsRegionSourceImpl implements MetricsRegionSource {
private final MetricsRegionWrapper regionWrapper;

import org.apache.hadoop.metrics2.MetricsRecordBuilder;
import org.apache.hadoop.metrics2.impl.JmxCacheBuster;
import org.apache.hadoop.metrics2.lib.DynamicMetricsRegistry;
import org.apache.hadoop.metrics2.lib.Interns;
import org.apache.hadoop.metrics2.lib.MutableCounterLong;
import org.apache.hadoop.metrics2.lib.MutableHistogram;
@InterfaceAudience.Private
public class MetricsRegionSourceImpl implements MetricsRegionSource {
private final MetricsRegionWrapper regionWrapper;
