*/
package org.opendaylight.controller.clustering.it.provider;
-import com.google.common.base.Optional;
import com.google.common.base.Verify;
import com.google.common.util.concurrent.CheckedFuture;
import com.google.common.util.concurrent.Futures;
+import java.util.Optional;
import org.opendaylight.mdsal.common.api.DataValidationFailedException;
import org.opendaylight.mdsal.common.api.PostCanCommitStep;
import org.opendaylight.mdsal.dom.api.DOMDataTreeCandidate;