| C | ↘ | F | LazyKeyedIterableTrait got worse |
| A | ↘ | C | LazyIterableTrait got worse |
| ⇢ | A | LazyIterableTrait::groupBy() added | |
| ⇢ | A | LazyKeyedIterableTrait::groupBy() added | |
| ⇢ | A | LazyKeyedIterableTrait::indexBy() added | |
| ⇢ | A | LazyKeyedIterableTrait::reduce() added | |
| ⇢ | A | LazyIterableTrait::exists() added | |
| ⇢ | A | LazyIterableTrait::concatAll() added | |
| ⇢ | A | LazyIterableTrait::indexBy() added | |
| ⇢ | A | LazyIterableTrait::reduce() added | |
| ⇢ | A | LazyKeyedIterableTrait::exists() added | |
| ⇢ | A | LazyKeyedIterableTrait::concatAll() added |