import java.util.Collections;\r
import java.util.List;\r
\r
+import javax.annotation.Nonnull;\r
import javax.annotation.Nullable;\r
\r
import org.opendaylight.controller.md.sal.binding.api.BindingTransactionChain;\r
import com.google.common.annotations.VisibleForTesting;\r
import com.google.common.base.Optional;\r
import com.google.common.base.Strings;\r
-\r
-import javax.annotation.Nonnull;\r
public class PortHandler implements TransactionChainListener {\r
\r
private static final Logger LOG = LoggerFactory.getLogger(PortHandler.class);\r