import org.openecomp.sdc.versioning.dao.types.Version;
import org.openecomp.sdc.versioning.types.Item;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.Objects;
-import java.util.Optional;
+import java.util.*;
/**
* Created by ayalaben on 8/28/2017