| B | ↗ | A | Collection improved |
| ⇢ | A | LazyCollection::empty() added | |
| ⇢ | A | Collection::getIterator() added | |
| A | ↛ | Str::seek() removed | |
| A | ↛ | Collection::seek() removed | |
| A | ↛ | Collection::current() removed | |
| A | ↛ | Collection::rewind() removed | |
| A | ↛ | Collection::key() removed | |
| A | ↛ | Collection::next() removed | |
| A | ↛ | Collection::valid() removed |