return new SparseSet<E>();
}
public static <E> FastSet<E> newSet(Order<? super E> order) {
return new SparseSet<E>(order);
}
<BUG>@SuppressWarnings("unchecked")
public <E1 extends E> FastSet<E1> downcast() {
return (FastSet<E1>) this;
}</BUG>
@Override

return new SparseSet<E>();
}
public static <E> FastSet<E> newSet(Order<? super E> order) {
return new SparseSet<E>(order);
}
@Override
