import java.util.Map;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
public class MetricsRegionWrapperImpl implements MetricsRegionWrapper, Closeable {
<BUG>public static final int PERIOD = 45;
private final HRegion region;</BUG>
private ScheduledExecutorService executor;
private Runnable runnable;
private long numStoreFiles;

import java.util.Map;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
public class MetricsRegionWrapperImpl implements MetricsRegionWrapper, Closeable {
public static final int PERIOD = 45;
public static final String UNKNOWN = "unknown";
private final HRegion region;
private ScheduledExecutorService executor;
private Runnable runnable;
private long numStoreFiles;
