import org.opendaylight.controller.cluster.access.ABIVersion;
import org.opendaylight.controller.cluster.access.client.BackendInfo;
import org.opendaylight.controller.cluster.access.concepts.LocalHistoryIdentifier;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.ReadOnlyDataTree;
+import org.opendaylight.yangtools.yang.data.tree.api.ReadOnlyDataTree;
/**
* Combined backend tracking. Aside from usual {@link BackendInfo}, this object also tracks the cookie assigned