import java.util.concurrent.TimeUnit;
import org.checkerframework.checker.lock.qual.GuardedBy;
import org.opendaylight.mdsal.dom.api.DOMDataBroker.DataTreeChangeExtension;
-import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonService;
-import org.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
+import org.opendaylight.mdsal.singleton.api.ClusterSingletonService;
+import org.opendaylight.mdsal.singleton.api.ServiceGroupIdentifier;
import org.opendaylight.yangtools.yang.data.codec.binfmt.NormalizedNodeStreamVersion;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;