import org.apache.commons.logging.LogFactory;
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.MetricMutableCounterLong;
<BUG>import org.apache.hadoop.metrics2.lib.MetricMutableStat;
</BUG>
public class MetricsRegionSourceImpl implements MetricsRegionSource {
private final MetricsRegionWrapper regionWrapper;
private boolean closed = false;

import org.apache.commons.logging.LogFactory;
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.MetricMutableCounterLong;
import org.apache.hadoop.metrics2.lib.MetricMutableHistogram;
public class MetricsRegionSourceImpl implements MetricsRegionSource {
private final MetricsRegionWrapper regionWrapper;
private boolean closed = false;
