-import com.google.common.util.concurrent.ListenableFuture;
-import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.GetTopologyDetailsInput;
-import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.GetTopologyDetailsOutput;
-import org.opendaylight.yang.gen.v1.urn.onf.otcc.yang.tapi.topology.rev181210.GetTopologyDetailsOutputBuilder;
-import org.opendaylight.yangtools.yang.common.RpcResult;
-import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
-