### Question:
EmptySimpleCollection implements SimpleCollection<E> { @Override public Iterator<E> structuralIterator() { return Collections.emptyIterator(); }  @Override int size(); @Override boolean isEmpty(); @Override Iterator<E> iterator(); @Override Iterator<E> structuralIterator();  }### Answer:
@Test public void structuralIterator() { final Iterator<String> iterator = COLLECTION.structuralIterator(); assertFalse(iterator.hasNext()); }