/guava/guava/src/com/google/common/collect/HashBiMap.java
return next == null && remaining > 0;
return next != null && remaining > 0;
int remaining = size(); @Override public boolean hasNext() { if (modCount != expectedModCount) { throw new ConcurrentModificationException(); } <extra_id_0> } @Override public T next() { if (!hasNext()) { throw new NoSuchElementException(); }