public boolean remove(Object o) { if (myHashSet.remove(o)) { myElements.remove(o); return true; } return false; }
public boolean add(T o) { if (myHashSet.add(o)) { myElements.add(o); return true; } return false; }
public T remove(final int index) { final T t = myElements.remove(index); myHashSet.remove(t); return t; }
public void add(final int index, final T element) { if (myHashSet.add(element)) { myElements.add(index, element); } }
public void clear() { myHashSet.clear(); myElements.clear(); }
public boolean contains(Object o) { return myHashSet.contains(o); }
public int lastIndexOf(final Object o) { final int index = myHashSet.index((T) o); return index >= 0 ? myElements.lastIndexOf(myHashSet.get(index)) : -1; }