import java.util.concurrent.ExecutionException;
import org.opendaylight.genius.infra.Datastore.Configuration;
import org.opendaylight.genius.infra.TypedReadWriteTransaction;
import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ext.routers.Routers;
import java.util.concurrent.ExecutionException;
import org.opendaylight.genius.infra.Datastore.Configuration;
import org.opendaylight.genius.infra.TypedReadWriteTransaction;
import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ext.routers.Routers;