public boolean containsAll(Collection collection) { for (Iterator i = collection.iterator(); i.hasNext();) { Object object = i.next(); if (!contains(object)) { return false; } } return true; }
public boolean containsAll(Collection collection) {  return wrappedSet.containsAll(collection); }
    public boolean containsAll(Collection collection)    {        for (Iterator i = collection.iterator(); i.hasNext();)        {            Object object = i.next();            if (!contains(object))            {                return false;            }        }        return true;    }