import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
+import com.google.common.base.Optional;
+import com.google.common.util.concurrent.CheckedFuture;
+
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
-import com.google.common.base.Optional;
-import com.google.common.util.concurrent.CheckedFuture;
import org.junit.Before;
import org.junit.Test;
import org.opendaylight.controller.md.sal.binding.api.DataBroker;