class org.apache.commons.collections.iterators.TransformIterator (implements java.util.Iterator)
class org.apache.commons.collections.iterators.UnmodifiableIterator (implements java.util.Iterator, org.apache.commons.collections.Unmodifiable)
class org.apache.commons.collections.iterators.UnmodifiableListIterator (implements java.util.ListIterator, org.apache.commons.collections.Unmodifiable)