import java.util.Iterator;
class Foo<T> implements Iterable<T> {

  @Override
  public Iterator<T> iterator() {
    return null;
  }

  private void fofo() {
    for (Iterator<T> it = iterator(); it.hasNext();) {
      T item = it.next();
    }
    for (Iterator<T> it = this.iterator(); it.hasNext();) {
      T item = it.next();
    }
  }
}