import java.util.concurrent.locks.ReentrantLock;
import org.simantics.db.ChangeSet;
+import org.simantics.db.Disposable;
import org.simantics.db.Operation;
import org.simantics.db.VirtualGraph;
import org.simantics.db.common.utils.Logger;
// deny can always remove a persistent statement.
clusterStream.reallyFlush();
+ Disposable.safeDispose(session.clientChanges);
session.clientChanges = new ClientChangesImpl(session);