/guava/guava/src/com/google/common/collect/TreeTraverser.java
checkNotNull ( action ) ;
@Override public UnmodifiableIterator<T> iterator() { return postOrderIterator(root); } @Override public void forEach(Consumer<? super T> action) { <extra_id_0> new Consumer<T>() { @Override public void accept(T t) { children(t).forEach(this); action.accept(t); }