import static org.junit.Assert.assertNotNull;
-import com.google.common.base.Optional;
import io.netty.channel.Channel;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
+import java.util.Optional;
import org.junit.Test;
import org.opendaylight.protocol.pcep.PCEPCapability;
import org.opendaylight.protocol.pcep.PCEPSession;