205   struct Iterator : base::iterator<std::random_access_iterator_tag, int> {  in LookupReturn()  struct
206     Iterator(HandlerTable* tbl, int idx) : table(tbl), index(idx) {}  in LookupReturn()  function
207     value_type operator*() const { return table->GetReturnOffset(index); }  in LookupReturn()
208     bool operator!=(const Iterator& other) const { return !(*this == other); }  in LookupReturn()
209     bool operator==(const Iterator& other) const {  in LookupReturn()
213     bool operator<=(const Iterator& other) { return index <= other.index; }  in LookupReturn()
214     Iterator& operator++() {  in LookupReturn()
218     Iterator& operator--() {  in LookupReturn()
222     Iterator& operator+=(difference_type offset) {  in LookupReturn()
226     difference_type operator-(const Iterator& other) const {  in LookupReturn()
229     HandlerTable* table;  in LookupReturn()
230     int index;  in LookupReturn()