import org.simantics.db.Operation;
import org.simantics.db.VirtualGraph;
import org.simantics.db.common.utils.Logger;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.exception.InternalException;
import org.simantics.db.exception.RuntimeDatabaseException;
import org.simantics.db.Operation;
import org.simantics.db.VirtualGraph;
import org.simantics.db.common.utils.Logger;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.exception.InternalException;
import org.simantics.db.exception.RuntimeDatabaseException;