*/
package org.opendaylight.controller.cluster.datastore.persisted;
-import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import java.util.Collection;
+import java.util.Optional;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;